The invention discloses a multifunctional tool box for bridge detection, and relates to the technical field of bridge detection. The multifunctional tool box for bridge detection comprises a tool box body, the outer wall of the tool box body is fixedly sleeved with a sunscreen heat insulation layer, an operation box is fixedly installed on the outer surface of the bottom of the sunscreen heat insulation layer, three concentric-square-shaped plates are fixedly installed on the adjacent inner walls of the tool box body, two sleeves are fixedly installed on the outer surface of the rear side of the tool box body, u-shaped rods are arranged in the two sets of sleeves, and the outer walls of the U-shaped rods are fixedly connected with two sets of fixing pieces through bolts. According to the multifunctional tool box for bridge detection, through cooperative use of a drawing box, a U-shaped sliding rod, a fixing sleeve, a sliding rod sleeve, a telescopic spring, a connecting rod, a damping plate and a rubber plate, when a detection tool jolts up and down in the drawing box, the damping plate is driven to move up and down, the buffering force is increased, and the amplitude of up-down jolting of the detection tool is reduced.