The invention discloses a gear press-mounting clamp convenient for adjustment of a mounting position, and belongs to the technical field of clamps. The gear press-mounting clamp convenient for adjustment of the mounting position comprises a workbench panel and a clamp bottom plate arranged on the workbench panel, wherein a gear groove for containing a gear is formed in the clamp bottom plate; a groove matching with the step height of the end face of the gear is formed in the bottom surface of the gear groove; a pressure sensor is arranged on the bottom surface of the groove; the height of the pressure sensor protruding out of the bottom surface of the groove is smaller than the depth of the groove; the clamp bottom plate is provided with two transversely arranged sliding chutes; the sliding chutes run through the upper and lower surfaces of the clamp bottom plate and are located on the two sides of the gear groove; the upper surface of the workbench panel is provided with two lengthways arranged T-shaped grooves. An anti-error function of the clamp is realized, manual distinguishing is unnecessary, press-mounting error caused by reversed placement of the gear on the clamp is avoided, and efficiency is increased.