On-site regular test of DC protection equipment of HVDC after put into operation has not been implemented due to lack of convenient and feasible method. That is serious problem for security and stability of the power grid. This paper proposed a novel on-site test method of DC protection equipment of HVDC. The advantage of the method are that not need to remove the equipment, not explain the photoelectric conversion agreement, not cause bad influence to the grid, small security risk, and lower cost . The on-site test device for dc protection equipment of HVDC has been developed with adds quantity of optical current transformer and zero flux current transformer. Its validity was verified by on-site testing of DC Protection Equipment in Echeng convert station of Jiangling-Echeng ±500kV HVDC transmission project which in operation for more than ten years.