Bridge negative bending moment stretch vehicle

The invention discloses a bridge negative bending moment stretch vehicle. The bridge negative bending moment stretch vehicle comprises a base, the base is provided with a lifting support, a lifting device and intelligent stretch equipment, the lifting support comprises an inner support body and an outer support body arranged from inside to outside in sequence, the lifting device comprises an innercylinder and an outer cylinder which are vertical, the outer cylinder is fixed to the inner support body, the inner cylinder penetrates through and is movably arranged in the outer cylinder, an electric gourd is connected to the top of the inner cylinder and is fixed to the top of the outer support body, the intelligent stretch equipment is arranged on the base, and the electric gourd controls the inner cylinder to move up and down and drives a jack of the intelligent stretch equipment to move up and down. Through the lifting device, the intelligent stretch equipment is driven to move up anddown and is arranged at the most proper working position at one side of a bridge, the base moves on a bridge deck through universal wheels, the position of the intelligent stretch equipment does not need to be manually moved and adjusted in the working process, the installation time of the intelligent stretch equipment is saved, and the construction precision and work efficiency are improved.