Testing device and system for simulating underground water seepage of subway structure

The invention discloses a testing device and system for simulating underground water seepage of a subway structure. According to the technical scheme, the testing device comprises a model frame used for filling a soil body, a reserved hole used for simulating tunnel excavation is formed in one side of the model frame, water tanks are installed on the two side surfaces adjacent to the surface where the reserved hole is located, one water tank is a water inlet tank, the other water tank is a water outlet tank, the water inlet tank is communicated with the model frame through a plurality of water inlet holes, the water outlet tank is communicated with the model frame through a plurality of drain holes, and water circulation can be formed among the water inlet tank, the model frame and the water outlet tank. According to the invention, the influence of the subway construction process on the underground water seepage state can be simulated, the simulation data is accurate, and reference can be provided for actual