In order to improve the surface properties of 304 stainless steel, laser alloying technology is used to prepare Ta-based alloyed layers with different process parameters on the surface of 304 stainless steel. X-ray diffractometer and scanning electron microscope are used to analyze and observe the composition and morphology of the alloyed layers. The hardness tester is used to test the hardness of the alloyed layer. The friction and wear tester is used to test the wear resistance of the alloyed layer. The electrochemical workstation is used to study the corrosion resistance of the sample in 3.5% NaCl solution. The results show that when the laser power is 900 W and the laser scanning rate is 1.5 mm/s, the prepared alloyed layer is more uniform and dense, and the main component of the alloyed layer is TaC. the average hardness of the 3# sample reaches 1 113.52 HV, which is 3.27 times that of base 0# sample. 2# sample has a friction factor of 0.45, which is 25% less than stainless steel; 3# sample has better corrosion resistance, the corrosion potential of base sample 0# Ecorr=-0.98 V, and the corrosion current density Jcorr=4.57×10-5 A·cm-2. Compared with the matrix sample 0#, the corrosion potential (-0.36 V) of the 3# sample is significantly increased, and the corrosion current density (2.81×10-7 A·cm-2) is significantly reduced. The alloyed layer prepared on the surface of 304 stainless steel can fully improve its hardness, wear resistance, corrosion resistance, and other properties, which broadens the application field of 304 stainless steel.