Large-flow drainage emergency vehicle

According to the large-flow drainage emergency vehicle with the independent pump station or the self-priming pump, the rear carriage where the self-priming pump or the pump station is placed can be separated from the chassis to be placed on the ground, the structure is simple, and operation and use are more convenient. The device comprises a chassis, wheels, a power device, a self-priming pump or a self-walking robot pump station, and a hook arm mainly composed of a support, a sliding frame, a translation oil cylinder and a turnover oil cylinder. The hook arm is positioned in the rear middle of the chassis; the sliding frame is slidably arranged on the support in the front-back direction, and the translation oil cylinder used for driving the sliding frame to move front and back relative to the support is connected between the sliding frame and the support. A vertical arm extending upwards is arranged at the front part of the sliding frame; the upper end of the vertical arm and the front part of the rear carri