Self-locking anti-loosening rope pressing device for winch

The utility model discloses a self-locking anti-loosening rope pressing device for a winch. The self-locking anti-loosening rope pressing device comprises a main shaft, a first torsion spring, a second torsion spring, a first pressing plate, a second pressing plate and a pressing roller. The main shaft is fixed on wallboards on two sides of the winding drum bracket through threads; a right-hand thread and a left-hand thread are arranged on the main shaft; the right-hand thread is connected with a right-hand locking block; a left-hand locking block is connected to the left-hand thread; the first torsional spring is arranged between the left-handed locking block and the first pressing plate, one end of the first torsional spring is arranged in a blocking hole of the left-handed locking block, and the other end of the first torsional spring is buckled on the first pressing plate; the compression rollers comprise a first compression roller, a second compression roller and a third compression roller; a compression