TiO₂-CNTs/FeNi36 composite coating was fabricated by laser cladding technology in this paper, and the effect of core -shell TiO₂ CNTs reinforcement on the hole, microstructure and tribology properties of the composite laser cladding were studied. The results show that the number and size of holes in the invar alloy matrix is greatly reduced due to the addition of core-shell TiO₂ CNTs reinforcement, and the generation of holes in the composite coating is restricted by the reinforcement. The addition of reinforcement does not change the phase composition of invar alloy matrix, and the matrix alloy is still single-phase [FeNi] austenite. With the increase of reinforcement content, the lattice constant of invar alloy matrix decreases slowly, then keeps stable; the hardness of the composite coating has the stable value after a little growth. The stable microhardness of composite coating is about 315 HV, which is about 2.5 times that of the FeNi36 invar alloy coating. When the mass fraction of TiO₂ CNTs reinforcement is 1.5 wt%, the wear rate of the composite coating is minimum, which is reduced by 60% compared with single FeNi36 coating.