Special grab bucket for groove shaped like Chinese character'shan '

The special grab bucket comprises an upper bearing beam, a lower bearing beam, an electric hoist, a pull rod and a bucket body, the bucket body comprises a front end plate, a rear end plate and a combined bottom plate, and the combined bottom plate is connected between the front end plate and the rear end plate which are arranged in parallel; the combined bottom plate comprises two side bottom plates and a middle bottom plate, and the side bottom plates and the middle bottom plate are of concave surface structures; the middle bottom plate is located between the two side bottom plates, the front end and/or the rear end of the middle bottom plate are/is fixedly connected with the end faces of the side bottom plates through side end plates, and the side end plates are parallel to the front end plate or the rear end plate; the middle bottom plate is lower than the side bottom plates, the top end of the middle bottom plate is flush with the top ends of the side bottom plates, and the bottom end of the middle botto