The strength of laser cladding remanufactured column under impact load and the influence of remanufacturing process parameters on the strength were analyzed by using finite element method. Taking 400 mm double telescopic column as research object,a three-dimensional model of the column with cladding layer was established. The stress distribution and magnitude of the cladding layer and the matrix of the remanufactured column under the impact load were calculated,and the influence of cladding thickness,cladding material and laser power on the strength of remanufactured column was analyzed. The results show that the stress of each remanufactured column is less than the yield limit of material,which meets the strength requirements; the local stress of the cladding layer on the inner wall of the middle cylinder is greater than the yield limit of the material; increasing the thickness of cladding layer,choosing the material with smaller elastic modulus or reducing the laser cladding power can improve the strength of remanufactured column.