Abstract: The friction and wear directly affect the contact state between the armature and rails, which in turn affect the service life and launch efficiency of the electromagnetic launcher. Therefore, considering the longitudinal diffusion characteristics of the contact surface temperature under the action of Joule heat and friction heat, the Archard wear model was established under the action of temperature to analyze the influence of temperature on the wear between the armature and rails. The results showed that the amount of wear between the armature and rails mainly occurred on the surface of the armature, and the maximum amount of wear was concentrated on the edge of the armature tail. As the armature moved, the temperature of the contact surface gradually increased, the elastic modulus and hardness of the material decreased, and the amount of wear between the armature and rails increased. The increased wear on the contact surface also reflected that the increase in the temperature of the contact surface accelerated the ablation of the armature surface.