Two-way opening self-locking sewage removing grab bucket

The invention discloses a two-way opening self-locking sewage removing grab bucket which includes a first grabbing device and a second grabbing device which are symmetrical to each other and are eachof an arc-shaped structure. The first grabbing device and the second grabbing device are of staggered and jointed fence structures; first connecting arms, second connecting arms, side cables and maincables are further included, wherein one end of each first connecting arm is fixedly connected to the corresponding main cable, the other end of each first connecting arm is connected to the corresponding second connecting arm, the second connecting arms are each of a bent structure, the other ends of the second connecting arms are mounted on the top ends of the grabbing devices, the second connecting arms correspond to the first grabbing devices and the second grabbing devices, the first grabbing devices and the second grabbing devices are connected to a lifting lug ring through the side cables, and the main cables ar