The invention discloses a geomechanics test platform for the water invasion regularity of a mine, which comprises a base, a box body, a reaction frame, a pressurized jack, a hydraulic control system and a data acquisition system and the like. When simulating the water invasion of the mine, test material is paved in the box body according to a calculated similarity ratio; an electrode, a stress sensor and a pore water pressure sensor are paved on a coal seam bottom plate by layers; and a data cable is led out from a pore preserved on a side surface. By filling water into the paved test material through the bottom plate of the box body, when the water in an aquifer is saturated, a pore preserved for coal mining in the front of the box body is opened for excavation, simultaneously, the hydraulic control system continue to fill water according to the pre-calculated water pressure, and the data acquisition system is started to record the test data until water invasion occurs at the bottom plate, and then excavation is stopped and the test is ended. The system structure is simple, can effectively simulate the water invasion regularity of the mine, and solves the problems that the indoor test can not simulate the role of seepage and erosion of confined water.