The utility model discloses a movable supporting and protecting support of a roadway heading machine. The movable supporting and protecting support of the roadway heading machine comprises two support units which are arranged front and back side by side, wherein each support unit comprises a base seat located at two sides of a heading machine and a top beam located above the heading machine, a lifting mechanism used for supporting each top beam is connected between each base seat and each top beam, a telescopic beam driven by a telescopic beam linear driving mechanism is arranged at the front end of each top beam, relieving teeth are arranged at the front end of each telescopic beam, a side protective plate driven by a side protective plate driving mechanism is arranged at two sides of each top beam in a sliding mode, and a pushing device driving the support units to move is connected between the two support units. By means of the structure, the support can be used for supporting and protecting the heading machine, can move along with the heading machine, and supports and protects a new heading space timely.