diff --git a/test_plans/cvl_1pps_test_plan.rst b/test_plans/cvl_1pps_test_plan.rst
new file mode 100644
index 00000000..628bcceb
--- /dev/null
+++ b/test_plans/cvl_1pps_test_plan.rst
@@ -0,0 +1,172 @@
+.. Copyright (c) <2021>, Intel Corporation
+   All rights reserved.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   - Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+
+   - Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in
+     the documentation and/or other materials provided with the
+     distribution.
+
+   - Neither the name of Intel Corporation nor the names of its
+     contributors may be used to endorse or promote products derived
+     from this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+   COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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+   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+   OF THE POSSIBILITY OF SUCH DAMAGE.
+
+==================
+CVL 1PPS Test Plan
+==================
+
+Description
+===========
+The E810 supports a total of four single-ended GPIO signals(SPD[20:23])plus one different GPIO signal (CLK_OUT_P/N),
+which is configured by default 1PPS(out). The SPD[20:23] is mapping to pin_id[0:3].
+This test plan is designed to check the value of related registers, which make up the 1PPS signal.
+The registers address depends on some hardware config.
+The test cases only give the example of Columbiaville_25g and Columbiaville_100g.
+
+
+Prerequisites
+=============
+
+Topology
+--------
+1node+1nic+2port+fwd
+2node+1nic+1port+loopback
+
+Hardware
+--------
+Supportted NICs: columbiaville_25g/columbiaville_100g
+
+Software
+--------
+dpdk: http://dpdk.org/git/dpdk
+scapy: http://www.secdev.org/projects/scapy/
+
+General set up
+--------------
+1. Copy ice OS default package to /lib/firmware/updates/intel/ice/ddp/ice.pkg,
+   then load driver::
+
+    # cp <ice package> /lib/firmware/updates/intel/ice/ddp/ice.pkg
+    # rmmod ice
+    # insmod <ice build dir>/ice.ko
+
+2. Compile DPDK::
+
+    # CC=gcc meson --werror -Denable_kmods=True -Dlibdir=lib --default-library=static <dpdk build dir>
+    # ninja -C <dpdk build dir> -j 110
+
+3. Get the pci device id and interface of DUT and tester. 
+   For example, 0000:18:00.0 and 0000:18:00.1 is pci device id,
+   ens785f0 and ens785f1 is interface::
+
+    <dpdk dir># ./usertools/dpdk-devbind.py -s
+
+    0000:18:00.0 'Device 159b' if=ens785f0 drv=ice unused=vfio-pci
+    0000:18:00.1 'Device 159b' if=ens785f1 drv=ice unused=vfio-pci
+
+4. Bind the DUT port to dpdk::
+
+    <dpdk dir># ./usertools/dpdk-devbind.py -b vfio-pci <DUT port pci device id>
+
+
+Test case
+=========
+
+..note:: 
+
+    when test the onboard NIC of HCC/SNR platform, the timer = 1, so all the register need to add 4 except GLGEN_GPIO_CTL.
+
+Test case 1: check registers when pin id is 0
+---------------------------------------------
+
+this case is designed to check the register value is right when pin id is 0.
+
+test steps
+~~~~~~~~~~
+1. start testpmd with different pin_id and dump registers::
+
+    <dpdk build dir>/app/dpdk-testpmd <EAL options> -a <DUT port pci device id>,pps_out='[pin:0]' -- -i --rxq=4 --txq=4
+    testpmd> read reg 0 0x00088998
+    testpmd> read reg 0 0x000889B8
+    testpmd> read reg 0 0x00088928
+    testpmd> read reg 0 0x00088930
+    testpmd> read reg 0 0x000880C8
+
+2. check the GLTSYN_AUX_OUT_0[0] 0x00088998 is 0x00000007 (7), GLTSYN_CLKO_0[0] 0x000889B8 is 0x1DCD6500 (500000000), the 0x00088928 and 0x00088930 is non-zero,
+   GLGEN_GPIO_CTL[0][2] 0x000880C8 is 8, the 4th bit is 1
+
+Test case 2: check registers when pin id is 1
+---------------------------------------------
+
+this case is designed to check the register value is right when pin id is 1.
+
+test steps
+~~~~~~~~~~
+1. start testpmd with different pin_id and dump registers::
+
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xf -n 4 -a 0000:18:00.0,pps_out='[pin:1]' -- -i --rxq=4 --txq=4
+    testpmd> read reg 0 0x000889A0
+    testpmd> read reg 0 0x000889C0
+    testpmd> read reg 0 0x00088938
+    testpmd> read reg 0 0x00088940
+    testpmd> read reg 0 0x000880CC
+
+2. check the GLTSYN_AUX_OUT_1[0] 0x000889A0 is 0x00000007 (7), GLTSYN_CLKO_1[0] 0x000889C0 is 0x1DCD6500 (500000000), the 0x00088938 and 0x00088940 is non-zero,
+   GLGEN_GPIO_CTL[1][2] 0x000880CC is 9, the 4th bit is 1
+
+Test case 3: check registers when pin id is 2
+---------------------------------------------
+
+this case is designed to check the register value is right when pin id is 2.
+
+test steps
+~~~~~~~~~~
+1. start testpmd with different pin_id and dump registers::
+
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xf -n 4 -a 0000:18:00.0,pps_out='[pin:2]' -- -i --rxq=4 --txq=4
+    testpmd> read reg 0 0x000889A8
+    testpmd> read reg 0 0x000889C8
+    testpmd> read reg 0 0x00088948
+    testpmd> read reg 0 0x00088950
+    testpmd> read reg 0 0x000880D0
+
+2. check the GLTSYN_AUX_OUT_2[0] 0x000889A8 is 0x00000007 (7), GLTSYN_CLKO_2[0] 0x000889C8 is 0x1DCD6500 (500000000), the 0x00088948 and 0x00088950 is non-zero,
+   GLGEN_GPIO_CTL[2][2] 0x000880D0 is A, the 4th bit is 1
+
+Test case 4: check registers when pin id is 3
+---------------------------------------------
+
+this case is designed to check the register value is right when pin id is 3.
+
+test steps
+~~~~~~~~~~
+1. start testpmd with different pin_id and dump registers::
+
+    ./x86_64-native-linuxapp-gcc/app/dpdk-testpmd -c 0xf -n 4 -a 0000:18:00.0,pps_out='[pin:3]' -- -i --rxq=4 --txq=4
+    testpmd> read reg 0 0x000889B0
+    testpmd> read reg 0 0x000889D0
+    testpmd> read reg 0 0x00088958
+    testpmd> read reg 0 0x00088960
+    testpmd> read reg 0 0x000880D4
+
+2. check the GLTSYN_AUX_OUT_3[0] 0x000889B0 is 0x00000007 (7), GLTSYN_CLKO_3[0] 0x000889D0 is 0x1DCD6500 (500000000), the 0x00088958 and 0x00088960 is non-zero,
+   GLGEN_GPIO_CTL[3][2] 0x000880D4 is B, the 4th bit is 1
\ No newline at end of file
diff --git a/test_plans/index.rst b/test_plans/index.rst
index 0c2a94d0..fdf3cb9f 100644
--- a/test_plans/index.rst
+++ b/test_plans/index.rst
@@ -41,6 +41,7 @@ The following are the test plans for the DPDK DTS automated test system.
     blocklist_test_plan
     checksum_offload_test_plan
     coremask_test_plan
+    cvl_1pps_test_plan
     cvl_advanced_rss_test_plan
     cvl_advanced_rss_gtpu_test_plan
     cvl_advanced_rss_pppoe_test_plan
