Belt sliding extension support

The utility model relates to the technical field of shield tunnel belt stacking, in particular to a belt sliding extension support which comprises a main body, a belt sliding extension support, a belt sliding extension support and a belt support, the main body comprises a belt support, a motor is arranged on the surface of the belt support, an output shaft is arranged on the surface of the motor, and a rolling shaft is fixedly connected to the output shaft of the motor; the limiting mechanism comprises a screw rod, the screw rod is in threaded connection to the surface of the belt support, a connecting block is fixedly connected to the surface of the screw rod, a guide rod is movably connected to the surface of the belt support, and a limiting plate is fixedly connected to the surface of the guide rod. Through the screw rod, the connecting block, the fixing block, the limiting plate, the guide rod and the rotating handle, the relative distance between the two sets of rotating rods can be adjusted according to