Steel rolling heating furnace with automatic diffusion function

The utility model relates to the technical field of steel rolling heating, and discloses a steel rolling heating furnace with an automatic diffusion function, which comprises a heating furnace, a diffusion mechanism is arranged on the heating furnace, the diffusion mechanism comprises a pressure sensor, a signal line and a motor, the signal output end of the pressure sensor is connected with one end of the signal line, and the other end of the signal line is connected with the motor. One end of the signal line is connected with the signal receiving end of the motor, the outer wall of the motor is connected with the inner wall of the motor box, the outer wall of the motor box is connected with the outer wall of the heating furnace, the diffusing mechanism further comprises a first rotating rod and a positioning rod, and one end of the first rotating rod is connected with the output end of the motor through a coupler. The purposes that when the gas pressure is too high, diffusion operation is automatically cond