Yaw locking device for wind power generation

The utility model provides a wind power generation yaw locking device, which comprises a tower drum, a fan, a fixing seat and a locking piece, the fan comprises a cabin base and a wind wheel blade, the cabin base is rotatably arranged at the top of the tower drum, the wind wheel blade is rotatably connected onto the cabin base, and a locking hole is arranged on the cabin base; the fixed seat is fixedly sleeved on the tower drum, a guide groove is concavely formed in the side surface, facing the cabin base, of the fixed seat, and a gear ring is arranged on the inner wall of the guide groove; the locking piece comprises a movable gear, a rotary driving piece and a telescopic piece, the movable gear is inserted into the guide groove and meshed with the gear ring, the rotary driving piece is connected with the movable gear, and the telescopic piece is arranged on the rotary driving piece; the rotary driving piece can drive the movable gear to rotate, then the telescopic piece is driven to move along the guide gro