Crack sealing machine for road construction

The invention relates to the technical field of road construction, and discloses a crack sealing machine for road construction, the crack sealing machine comprises a vehicle body, a walking mechanism, a reversing mechanism and a guide mechanism, and a storage box is arranged on one side, far away from the ground, of the vehicle body; the guide mechanism is arranged at one end of the vehicle body and comprises a rotating plate rotationally connected with the vehicle body, a sliding sleeve is arranged on the side, close to the ground, of the rotating plate, a sliding rod is slidably connected to the side, close to the ground, of the sliding sleeve, a second fixing plate is fixedly connected to the end of the sliding rod, a spray head is arranged in the middle of the second fixing plate, and a guide wheel is arranged at one end of the second fixing plate; the reversing mechanism is arranged on the side, close to the guide mechanism, of the vehicle body and comprises two second rotating shafts rotationally connec