Underwater bridge pier anti-scouring device and using method thereof

The invention relates to the technical field of scour prevention, and discloses an underwater bridge pier scour prevention device and a using method thereof.The underwater bridge pier scour prevention device comprises a main body, the top and the bottom of the main body are fixedly connected with discs, and a plurality of rectangular grooves are formed in the tops of the discs and penetrate to the outer walls of the bottoms of the discs. When a gear shaft rotates, a push-pull rod can be driven to rotate back and forth, when the push-pull rod rotates back and forth, a connecting plate can be pulled to enable a circular shaft to rotate back and forth in a square block, when the circular shaft rotates, a swing plate can be driven to rotate through a hollow sleeve, and when the hollow sleeve drives the swing plate to rotate, extrusion is conducted through an L-shaped rod and a protrusion at the bottom of the square block; when the hollow sleeve rotates, the L-shaped rod can drive the swing plate to deflect throug