The invention provides pressure permeable equipment for a joint outer protective layer test. The pressure permeable equipment for the joint outer protective layer test comprises a pressure container,a heating part, a water pressure monitoring device, a thermometer and a liquid supply device; a liquid inlet, a liquid outlet and a hydraulic supplementary hole are arranged on the pressure container;a liquid inlet valve is arranged on the liquid inlet; a liquid outlet valve is arranged on the liquid outlet; a hydraulic supplementary valve is arranged on the hydraulic supplementary hole; the heating part is arranged in the pressure container; the water pressure monitoring device is used for mentoring the pressure of liquid in the pressure container; the thermometer is arranged on the pressurecontainer, and used for monitoring the temperature of the liquid in the pressure container; and the liquid supply device is used for conveying solution to the liquid inlet and the hydraulic supplementary hole, and also used for receiving solution discharged by the liquid outlet. According to the pressure permeable equipment for the joint outer protective layer test in the invention, test solutionin the liquid supply device is sent into the pressure container; the test solution in the pressure container can be kept in the pre-set hydraulic range; and the concentration of the test solution inthe liquid supply device in the invention can be set according to the electrical conductivity required by the test solution.