In order to study the difference in tensile mechanical properties between laser cladding 304 stainless steel and rolled 304 stainless steel, a single laser cladding 304 stainless steel experiment was carried out on the surface of 27SiMn steel substrate at different laser scanning speeds, and the macroscopic morphology and microstructure of the single pass cladding layer were obtained. A multi-pass lapping experiment was carried out at a single pass laser scanning speed of good formability, and the cross-section macroscopic morphology of the cladding layer was obtained. Finally, multi-layer accumulation was carried out to obtain the tensile mechanical property curve and the tensile fracture morphology. The results show that with the increasing laser scanning speed, the single pass cladding layer has poor formability. Under the condition of 50% lap rate, the obtained cladding layer has good formability. The tensile strength of laser cladding 304 stainless steel is 551.32 MPa, and the tensile fracture morphology shows obvious ductile fracture, the tensile strength of the original rolled 304 stainless steel is 713.11 MPa, and the tensile fracture morphology shows obvious brittle fracture.