The invention discloses a light movable assembly type bridge overhaul auxiliary platform. The light movable assembly type bridge overhaul auxiliary platform comprises a balance weight table, a left support, a right support, a balanced beam, a transverse connection beam, a safe cage ladder and a folded hanging basket; the balance weight table is connected with the lower portion of a rear support by adoption of a plug pin; the left end and the middle of the balanced beam are connected with the left support and the right support through pressure-bearing hinge supporting seats with rotation limiting, the transverse connection beam is connected with the left support and the right support through bolts, a plurality of spare connecting holes are formed in the balanced beam and the transverse connection beam, the different spare connecting holes can be adopted for connection according to the on-site requirements, and balanced force arms are changed; the right end of the balanced beam is connected with the upper portion of the safe cage ladder through bolts; and the folded hanging basket is mounted on the lower portion of the safe cage ladder. The light movable assembly type bridge overhaul auxiliary platform has the advantages that the novel movable assembly type overhaul platform adopts the lever principle, stress is safe and reliable, mounting, dismounting and folding are flexible, moving is convenient, on-site environment adaptability is high, and the occupied space is small; and the platform is applied to bridge detecting and maintaining, on-site operation is easy, cost is low, and economic benefits are obvious.