Plant soilless culture water circulation system

The utility model relates to the technical field of plant cultivation, in particular to a water circulation system for soilless culture of plants, which prevents the plants from shifting, flushing down and other accidents caused by water flow impulsive force under constraint, and improves reliability. Comprising a cultivation circulating water base, plant inserting frames, a communicating pipe, a water pump, an external water pipe, a screw ring, a screw rod, a twisting handle, a bearing and a restraining piece, the multiple sets of plant inserting frames are arranged at the top end of the cultivation circulating water base, the left side and the right side of the rear end of the cultivation circulating water base communicate with the two sides of the communicating pipe correspondingly, and the water pump is installed on the rear side of the communicating pipe; the upper portions of the inner sides of the front end and the rear end of the plant inserting frame are connected with the outer ends of the screw rin