Weapon equipment readiness evaluation is important for the meticulous and scientific usage management and maintenance support of weapon equipment. However， the current evaluation methods don’t fit the new situation and new requirements in terms of timeliness， accuracy and task matching. Therefore， an improved evaluation method for weapon equipment readiness based on the technical status of the main onboard machinery was presented. Through the simulation evaluation of the readiness for a certain type of destroyer， the feasibility of this method was verified， and some countermeasures and suggestions to further improve the method and mechanism for equipment readiness evaluation were proposed.