In order to study the effect of laser power on the microstructure and properties of tin-based Babbitt cladding layers, 800 W, 1 000 W and 1 200 W laser powers were used to prepare tin-based babbitt cladding layers on the surface of 20 steel. Phase constituents, microstructure, microhardness, and wear property of the Babbitt coatings with different laser power were investigated using XRD, SEM, microhardness tester, and friction-wear tester, respectively. The results showed that with the increase of laser power, the temperature of the molten pool increases, the cooling rate decreases, and the particle size of the SnSb hard spot particles increases gradually with the increase of laser power. The size of SnSb phase is smaller when the laser power is low, and the distribution is uniform. With the increase of laser power, the size and number of SnSb phase increases, and the hardness and wear resistance of the cladding layer also decrease. The average microhardness of the Babbitt alloy coatings of 800 W laser power is about 35.7 HV, the average friction coefficient is 0.257, and the wear mechanism are abrasive wear and surface fatigue wear.