The Fe-based Ni /WC cermet coatings are covered on the surface of 45 # steels by the plasma spraying technique, the coatings are remelted under four laser remelting trajectories, and the influences of laser remelting trajectories on the microstructure and properties of the coatings are investigated. The results show that the circular laser remelting trajectory exerts the most obvious improvement on the coating properties. The element transfer occurs between the substrate and the remelted layers under the action of convective mass, and the combination mode between the substrate and the remelted layers changes from mechanical bonding to metallurgical bonding. WC, W2C and other hard phases play the role of dispersion-strengthening in the cladding layer. The micro-hardness and wear loss of the coatings under the circular laser remelting trajectories are 1.4 times and 33.7% of those under dotted laser remelting trajectories, respectively. The porosity of the coating under the circular laser remelting trajectories is the lowest.