In order to improve the in-situ synthesized coating quality by laser cladding, in-situ laser cladding coating on TC4 titanium alloy surface is processed by laser remelting. Microstructure, phase, and microhardness of the coatings are studied by scanning electron microscope (SEM), X-ray diffractometer (XRD) and micro-hardness tester. The results show that the pore of in-situ coating bottom is eliminated and the ceramic phase of coating is distributed homogeneously by laser remelting so that microstructure becomes denser. After laser remelting, the microhardness gradient is reduced. The average microhardness and coating quality are enhanced by laser remelting.