Offshore floating oil collecting device

The invention provides an offshore floating oil collecting device. The device comprises a shell, a power device, a shovel type oil collecting device, a water pump, an oil-water separation tank and a control device; the power device is mounted on the shell, connected with the control device and used for providing power and buoyancy for the shell, and the shovel type oil collecting device is arranged at the front end of the shell and used for collecting floating oil; an oil outlet of the shovel type oil collecting device is connected with the oil-water separation tank through the water pump, the oil-water separation tank comprises a cabin for separating oil from water, and the cabin is provided with an oil outlet and a seawater discharge port; and floating oil collected by the shovel type oil collecting device is sucked into the oil-water separation tank through the water pump to be separated, and oil and water are respectively discharged from the oil outlet and the seawater discharge port. Leaked oil is treate