The invention belongs to the field of equipment laser repairing, and particularly relates to a repairing method of a movable cross head. The repairing method includes the following steps that 1, dimension detection and form and location tolerance detection of the movable cross head and nondestructive test detection are carried out; 2, the movable cross head is mechanically cleaned, and an oxidation layer and a fatigue layer are completely removed; 3, the movable cross head is subjected to laser cladding repairing according to the detection result, a cladding material and a parent material of the movable cross head are fused, and a cladding layer is formed; and 4, the movable cross head is mechanically machined and detected after being repaired. The cladding layer and a basal body of the movable cross head are metallurgically bound, the bonding strength is not smaller than 90% that of an original base material, the surface layer corrosion and abrasion resistance is not lower than that of the original base material and a coating, the hardness can meet the working condition requirements of the movable cross head, the production cost is low, and the cost performance of the product is high.