Sewage sampling device

The utility model discloses a sewage sampling device which adopts the technical scheme that the sewage sampling device comprises a bottom plate, an air bag group, an air pipe, an inflating and deflating device, a motor, a pump, a second pipe, a first pipe, a flow dividing pipe, a valve, a sliding rail, a sliding strip, a collecting box, a sampling pipe, a collecting head, a sliding block, a supporting plate, a sliding way, a lead screw, a base, a clamping way and a clamping ring. The air bag group is arranged on the outer side of the bottom plate, so that buoyancy can be better provided for the device; the collecting box is arranged to be in a sliding installation type, the first pipe and the second pipe are hoses, and the motor is detachable, so that the collecting box is convenient to detach and place; the sliding block can drive the sampling pipe to move up and down, sewage at different depths can be collected conveniently, the sampling pipe cannot incline along with flowing in water flow after being fixed