The invention relates to bridge support structure pier reinforcement equipment and a construction technology thereof. The bridge support structure pier reinforcement equipment comprises a mounting frame, the mounting frame is of a U-shaped structure, and the mounting frame is of a telescopic structure. Two fixing locking devices are installed on the inner wall of the mounting frame, and the two fixing locking devices are symmetrically located on the left and right sides of the mounting frame. Abutting telescopic rods are installed on the inner wall of the front end of the mounting frame, and the abutting telescopic rods are installed on an abutting operating plate. The bridge support structure pier reinforcement equipment and the construction technology thereof solve the difficult problemsthat during the process of reinforcing a bridge pier by pasting a steel plate, the steel plate needs to be manually clamped by a special U-shaped frame for clamping or supported by a wooden pole after being pasted, the special U-shaped frame cannot be adjusted according to the specifications of piers, the range of application is small, corresponding clamping tools are required to be selected according to the piers of different specifications, manual support operation of the pasted steel plate with the help of the tools is complicated, the labor intensity is high, the stability is poor, and the work efficiency is low.