The invention discloses a deflection clamping device used for installation of an arch frame in tunnel construction. The deflection clamping device contains a vertical revolving support device, a hydraulic winch, a limiting pulley, a deflection arm and a lifting support cantilever. The side edge at one end of the deflection arm is fixedly connected to the vertical revolving support device through bolts. The other end of the deflection arm is provided with a cantilever end. One end of the lifting support cantilever is fixedly connected to a fixing end of the deflection arm. The vertical revolving support device is fixedly connected to a base of a construction platform. Rapidly and flexible butt-joint and firm connection of an installation flange of the arc frame in tunnel construction are realized. The same kind of equipment does not need to perform accurate operation repetitively so that a time-consuming and labor-consuming problem of hard butt-joint is resolved. Meanwhile, the device can work with a main clamping device (a middle arm clamping device) to form a three-point fixing type after installation and formation of the overall arch frame so that the front-and-back distance of the overall arch frame is adjusted. It is no longer difficult to adjust the overall arch steel frame by other similar equipment. The device obtains good effect.