Flushing flap valve

The invention discloses a flushing flap valve. The flushing flap valve comprises a door frame and a valve body. A first locking piece is fixed to the valve body. The driver is fixed to the door frame, and the connecting rod can be driven by the driver to move linearly. The second locking piece is fixedly connected with the connecting rod, can linearly move under the driving of the connecting rod and is provided with a pre-locking section and a locking section, the included angle between the pre-locking section and the locking section is larger than 180 degrees, the second locking piece is matched with the first locking piece, and when the second locking piece moves from the pre-locking section to the locking section relative to the first locking piece, the door body can be closed. When the second locking piece moves in the same direction relative to the first locking piece and moves out of the locking section, the door body can be opened. According to the scheme, the rod linearly moves to drive the second loc