A connecting clamp for template assembling includes: a left clamp unit (1) and a right clamp unit (2), wherein the left clamp unit (1) is rotatably connected to the right clamp unit (2) through a shaft (3); clamping faces (13) and positioning-correction faces (14) corresponding to frames (101) of templates (10) are provided at front portions of both the left clamp unit (1) and the right clamp unit (2); a fixer is provided at rear portions of the left clamp unit (1) and the right clamp unit (2), wherein the fixer enables the front portions of the left clamp units (1) and the right clamp unit (2) to grip the frames (101) of the templates (10). The present invention has advantages such as a simple structure, convenient use and adaptability to assembling of various templates.