Auxiliary support for installing and fixing civil air defense door frame

The utility model relates to the technical field of installation auxiliary equipment, in particular to a civil air defense door frame installation fixing auxiliary support, a second motor drives a second lead screw to rotate, an upper clamping plate is driven to move to be matched with a lower clamping plate to clamp and support a civil air defense door frame, and a lifting mechanism drives the civil air defense door frame to move and adjust the height of the civil air defense door frame. The civil air defense door frame is pushed to move to a designated position through the first air cylinder and the second air cylinder, the civil air defense door frame can be conveniently and rapidly installed, the flexibility is high, the door frame is stably clamped and fixed through the upper clamping plate and the lower clamping plate, and the safety is high; comprising a base, a chassis, wheels and universal wheels, the chassis is fixedly arranged at the bottom of the base, the wheels are rotationally arranged at the b