Driving chain wheel walking mechanism and heading machine

The utility model provides a driving chain wheel walking mechanism and a heading machine, the driving chain wheel walking mechanism comprises a speed reducer, a driving chain wheel, a track frame and a track shoe, the speed reducer is connected to the track frame, the driving chain wheel is connected with the speed reducer, and the driving chain wheel is connected with the track shoe; the driving chain wheel comprises a plurality of wheel teeth, the front face of each wheel tooth comprises a first straight line section, an outer arc line and an inner arc line, and the two ends of the first straight line are tangent to the ends of the outer arc line and the inner arc line correspondingly. Tooth grooves are formed between the gear teeth, and the two ends of each tooth groove are connected with the inner arc lines of the adjacent gear teeth correspondingly. And the upper surface of the tooth groove is a plane. The front face of the wheel teeth of the driving chain wheel walking mechanism is of a double-arc-strai