The utility model discloses a supporting and rotating structure of a heading machine. The device comprises a connecting frame, a rotating frame and a rotating shaft, shaft holes are formed in the connecting frame and the rotary frame; the rotating shaft is inserted into the shaft hole to connect the connecting frame and the rotating frame together; a central oil hole, an annular oil hole and a radial through hole for communicating the central oil hole with the annular oil hole are formed in the rotating shaft; a one-way valve is arranged at the end part of a central oil hole of the rotating shaft; an elastic washer and a screw plug are arranged above the one-way valve; a limiting plate is arranged at the top end of the rotary frame; the limiting plate is fixed on the rotary frame through abolt; one end of the limiting plate makes contact with the top of the rotating shaft. The connecting frame and the rotating frame are connected, rotation of the rotating frame on the connecting frameis achieved, the oil hole and the one-way valve are arranged on the rotating shaft, lubrication of the connecting frame and the rotating frame in the using process is guaranteed, it is guaranteed that the connecting frame and the rotating frame are flexible in rotation and accurate in position, and the advantages of being simple in structure and long in service life are achieved.