Assembly tool for drive main shaft of escalator and drive main shaft of moving sidewalk

The invention relates to an assembly tool for a drive main shaft of an escalator and a drive main shaft of a moving sidewalk. The assembly tool is characterized in that the tool is equipped with a left step chain wheel 1 and a right step chain wheel 2, wherein the left step chain wheel 1 and the right step chain wheel 2 are separately fixedly arranged at the two ends of a shaft tube 3; a shaft 4 is arranged in the shaft tube 3 in a penetrating mode; the left step chain wheel 1 and a drive chain wheel 5 are fixedly arranged together; a small chain wheel sleeves the shaft tube 3; the shaft tube 3 is arranged on a positioning supporting frame 14 and a movable supporting frame 15 through a roller wheel 12; a synchronizing shaft 7 is arranged between the positioning supporting frame 14 and the movable supporting frame 15 in a penetrating mode; angle steel 8 is separately fixedly arranged on the positioning supporting frame 14 and the movable supporting frame 15; a guide boot 10 is arranged at the lower end of the