Portable automatic bottom mud sampling device

The invention is applicable to the technical field of sediment sampling, and provides a portable automatic sediment sampling device which comprises an integrated box, a sampling chamber, an air chamber and a reaction chamber are sequentially fixed in the integrated box, a connecting assembly is arranged between the sampling chamber and the air chamber, a movable piston is slidably arranged in the sampling chamber, and a rubber ring is fixed to the peripheral side face of the movable piston. A valve is arranged on the surface of the air chamber; a controller is fixed in the integrated box; the pressure sensor is electrically connected with the input end of the controller; the connecting assembly is electrically connected with the output end of the controller; according to the bottom mud sampling device, automation of bottom mud sampling is achieved, in addition, the bottom mud sampling device does not need to be matched with a large ship for use, the cost of needed manpower and material resources is reduced, a