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In order to study the properties of Ti (CN) ceramic coating, nitrogen arc cladding technology was carried out using TXII500 argon arc cladding machine in nitrogen gas atmosphere, and TiCN based composite coating was preparated on the Q235B specimen surface which is precoated titanium powder and graphite powder. The molten coating was tudied under the cladding current respectively in 200 A, 220 A and 240A. The microstructure, phase composition, micro hardness and wear resistance were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD), microhardness tester and reciprocating friction testing machine. The results show that the generation of the Ti (CN) phase is the most when the cladding current is 200A, The microscopic hardness of the coating is reduced with the increase of current, which provides a theoretical basis for the optimization of the process further.