The WC7Co ceramic particles with oxidation resistance and good toughness were selected as enhancement phase,and the WC7Co/TC4 composite wear-resistant coating was prepared on the surface of TA2 pure titanium substrate by laser cladding. The microstructure characteristic,interfacial reaction behavior of WC7Co particles and evolution of phase composition of composite coating were analyzed by means of scanning electron microscope,energy dispersive spectrometer,X-ray diffraction and microhardness tester. The results show that there are two typical microstructures of the composite coating according to the evolution state of WC7Co particles during the laser cladding process,which are the eutectic structure of W,TiC and Ti generated by the dissolved WC7Co particles and composite structure of undissolved WC7Co paritcles,respectively. A 2 ～ 3 μm reaction layer composed by W and TiC is formed in the bonding interface between WC7Co particles and TC4 matrix. The main phases of composite coating are Ti solid solution,W,TiC,VC,Co3W3 C,W2C and so on.