Device used for extracting, separating and transplanting fat

The utility model discloses a device used for extracting, separating, and transplanting the fat. The device comprises an injector and a collecting container, wherein a fatty oil separator and a suction piston are arranged in an injector cylinder body; the back end of the fatty oil separator is connected with the suction piston through a flexible connecting piece; the suction piston and the inner wall of the cylinder body are hermetically arranged, and the back part is connected with a suction handle driving the suction piston to move along the inner wall of the cylinder body; the fatty oil separator is provided with an annular fixed sleeve with the external diameter adaptable to the internal diameter of the injector cylinder body, at least one fatty oil filter screen and at least one counter-weight ring to be combined to a whole through the annular fixed sleeve, and the fatty oil separator is coaxially arranged with the injector cylinder body; and the collecting container is a cylinder body, a liquid inlet is