Based on four factors experimental method,the effect on the wear-resisting property and hardness of arc-sprayed coatings was investigated by four important parameters,such as compressed air pressure,spraying current,spraying distance,and wire feeding speed.In the paper,the orthogonal experiment method was applied to optimize those four parameters.T12 high-carbon steel wire and SCDP-3 spray gun was used in the experiment.SKODA-Savin plunge Wear test machines and the HB3000 Brinell hardness tester were used to measure the wear resistance and hardness of the coating.