The invention relates to a device for simulating a geothermal tail water recharge path and an application method thereof. The device comprises a water filling tank filled with clean water and a waterfilling tank filled with coloring liquid which are respectively connected with a first interface and a second interface of a three-way pipe through a first valve and a second valve, wherein a third interface of the three-way pipe is connected with a surge chamber, a water pump inlet, a first mass flowmeter inlet and a water filling steel pipe, the water filling steel pipe penetrates through a baseplate at one side of a presser, a water taking steel pipe penetrates through the other side of the presser, the water taking steel pipe is connected with a second mass flowmeter and a water taking pump inlet through a conduction pipe, a water taking pump outlet is connected with a drainage pipe having a fourth valve through a conduction pipe, the drainage pipe stretches into a beaker, the presseris placed in a simulation chamber, a transparent quartz bead layer is laid below the presser, the transparent quartz bead layer is internally laid with multiple rigid transparent nets, during use, the movement situation of the coloring liquid in the simulation chamber is observed, and the geothermal tail water recharge path is simulated. The device is advantaged in that the geothermal tail watermovement process in a small-scale scope is simulated, and the geothermal tail water recharge path is indirectly predicted.