Pile foundation model loading device under cyclic load

The invention discloses a pile foundation model loading device under a cyclic load. The pile foundation model loading device comprises a main frame, a counter-force frame at the top of the main frame,a horizontal steel frame with fixed pulleys at the top of the counter-force frame, a horizontal cross beam at the side portion of the counter-force frame, a vertical cyclic loading system on the leftside of the main structure, a horizontal cyclic loading system on the right side of the main structure, a first counterweight, a second counterweight, a dynamometer and a displacement sensor; and thedynamometer is used for measuring the vertical cyclic load value and the horizontal cyclic load value, the displacement sensor can detect the horizontal displacement and the vertical displacement ofa pile foundation, the left side of a model groove is also provided with a controllable drainage partition plate, so that pore water is conveniently discharged, and a pulley is arranged at the bottomof a main groove body to faci