The utility model relates to the field of rock engineering, in particular to a shale hydration expansion stress and pore pressure transmission measurement device capable of measuring the transmission process of shale hydration expansion stress and pore pressure. The shale hydration expansion stress and pore pressure transmission measurement device comprises a pressure container, an upstream connector, a downstream connector, a downstream clamping plate, a water injection device, a confining pressure device, a heat shrink tube, an upstream porous bearing plate and a downstream porous bearing plate, wherein an upstream connector main body is connected with the left end of the pressure container through a sealing O-shaped ring, the confining pressure device is communicated with the inside of the pressure container through a confining pressure injection hole, and the downstream connector is provided with a pore air outlet hole. The shale hydration expansion stress and pore pressure transmission measurement device has the advantages of being capable of measuring the transmission process of shale hydration expansion stress and pore pressure, and then assisting in studying the damage intensity, damage degree, damage speed and the like of shale well wall hydration expansion.