Water surface floating object collecting device and collecting ship

The invention relates to a water surface floating object collecting device, and belongs to the field of water pollution treatment. The device comprises a mounting frame, a water flow ring and an operating device, wherein the mounting frame comprises a flat plate and a plurality of clamping grooves, the water flow ring is of a cylindrical annular structure, an annular cavity is formed in the circumferential side of the water flow ring, a plurality of layers of air holes communicating with the annular cavity are machined in the circumferential side of the inner wall of the water flow ring, eachlayer of air holes comprises the corresponding plurality of air holes, the axes of the air holes incline towards the rear end of the water flow ring, a net bag is arranged at the rear end of the waterflow ring, a connecting pipe is arranged on the water flow ring, an air inlet pipe is arranged in the connecting pipe and communicates with the annular cavity, the air inlet pipe is connected with air compression equipment, a