The utility model relates to an operation structure of a clamp, which is used to drive a clamp pushing unit； the operation structure of the clamp comprises a body, a front linkage to drive the clamp pushing unit, a return spring to move the front linkage backward, a press control to pivot on the body, a front linkage to pivot on the press control, a lower linkage to pivot on the body, and two ends of the lower linkage to pivot on the body respectively. The lower connecting boom can push against the forward displacement of the front connecting boom.一種施夾器的操作結構，係用以帶動一夾釘推夾單元；該施夾器的操作結構包含有一本體；一前連動件，帶動該夾釘推夾單元；一回復彈簧，連動該前連動件向後位移；一按控件，樞接於該本體；一前連動臂，樞接於該按控件；一下連動臂，兩端分別樞接於該本體與前連動臂，該下連動臂可推抵該前連動件向前位移。
