Heating device with uniform heating function

The utility model relates to the technical field of biaxially oriented film heating, and discloses a heating device capable of heating uniformly, which comprises a heating box, a placing port is arranged on the surface of the heating box, a ventilation plate is fixedly arranged on the surface of the heating box, a control assembly is arranged in the heating box, and the control assembly comprises a fixing plate, a support rod and a heating piece, according to the uniform-heating heating device, the control assembly is arranged, an output shaft of a motor drives a disc to rotate on the surface of a fixing plate, a supporting rod fixed to the surface of the disc and a round block synchronously rotate, the round block abuts against the inner wall of an arc-shaped rod in the rotating process, and the arc-shaped rod is subjected to abutting force; when the stretching film is stretched, the transverse rod fixed to the surface of the arc-shaped rod moves under the limitation of the limiting block, the transverse rod