The invention relates to the field of spinning, in particular to a polyester spinning device for spinning. By means of the spinning device, processing of polyester spinning is achieved, and the problem that the polyester yielding efficiency is low is solved. The spinning device comprises a feed box, a feed inlet is formed in the upper end of the feed box, a feed screw is arranged in the feed box, a first gear is arranged at one end of the feed screw, the first gear is meshed with a second gear, and the second gear is connected with an electromotor through a driving rod; the lower end of the feed box is connected with a feed pipe, a metering pump is arranged on the feed pipe, the lower end of the feed pipe is connected with a polyester spray head, a heating aluminum block is arranged outside the polyester spray head, electric heating pipes are arranged in the heating aluminum block, a heat radiating cavity is formed in the lower end of the heating aluminum block, an air intake cavity is formed in the middle of the heat radiating cavity, the lower end of the air intake cavity is connected with an air supply pipe, a blower is arranged at the tail end of the air supply pipe, and a rectifying plate is arranged in the air intake cavity. The polyester spinning device for spinning is simple in structure, convenient to use and suitable for various places.