Laser cladding of Al-Si+Al2O3 composite layer on ZL102 alloy was performed by 5 kW CO2 laser. The effect of the laser cladding parameters to layer was investigated. The analysis on the microstructure, the hardness and wear resistance of laser cladding layer shows that, the Al-Si+Al2O3 layer is uniform, continuous and free of pores and cracks by optimized parameters. Al2O3 particles disperse in the matrix of α-Al and α-Al+Si eutectics with particle size of 10～20 μm. The interface between the layer and the substructure was epitaxial, with excellent bonding by the strong metallurgical interface. The hardness and wear resistance of laser cladding layer is about 2 times (in the range of Hv 190～260) and 4 times higher than that of the substrate, respectively.