Abstract: In order to improve the corrosion performance of the inner wall of the hydraulic support column and better adapt to the needs of modern coal mining,three kinds of Fe-based coatings were prepared on the inner wall of a hydraulic support column by laser cladding technology,and the microstructure,hardness distribution and corrosion resistance of the Fe-based corrosion-resistant coating on the inner wall of a column were analyzed by metallographic microscope,hardness test,electrochemical corrosion and salt spray testing machine. The results show that the microstructure of the three coatings is compact and uniform,the average hardness of the three coatings is 1-2 times that of the matrix,and the average microhardness of A2is 545. 8 HV due to the maximum Mo content,which is higher than the average hardness of A1 and A3. The results of electrochemical test and salt spray test show that the corrosion resistance of the three coatings is better than that of the matrix,and the corrosion resistance of A3 is the best.