Small watershed water and soil conservation sand blocking device

The invention relates to the technical field of hydraulic engineering, in particular to a small watershed water and soil conservation sand blocking device which comprises a base and a supporting plate fixedly connected to the base, elastic telescopic rods are fixedly connected to the left side and the right side of the front side face of the supporting plate, and a sand prevention plate used for blocking silt in wind is fixedly connected between the ends of the elastic telescopic rods. The device is placed on a river slope, when sand storm makes contact with a sand prevention plate, the sand prevention plate blocks and filters silt in wind, the blocked silt falls downwards, meanwhile, part of the sand storm is blown to a swing net plate to be blocked, a driving motor is started to rotate forwards and backwards alternately, a right side sliding block drives a connecting frame to move downwards, and the sand prevention device is started. And when the push plate moves to the upper rear part, the push plate can p