Abstract:The processing quality of box directly relates to the box assembly accuracy and working condition,at the same time,it has a decisive impact to the usability,working precision and service life of the whole mechanical equipment.From the perspective of the requirements of complex box processing technology,taking the precise intelligent boring and milling machining center as a platform,the CNC machining process of the complex box was analyzed from the origin alignment of box parts online detection system,the hole system process optimization based on interior point penalty algorithm,process technology design of box parts.