Manufacturing system reconstruction optimization method and device based on digital twin technology

The invention discloses a manufacturing system reconstruction optimization method and system based on a digital twin technology, and relates to the technical field of intelligent manufacturing, and the method comprises the steps: dividing accessories needed by an order product into different accessory groups, and building a candidate resource equipment selection model; according to the accessory requirements in each accessory group, generating a composite process list corresponding to the accessory group by using a product life cycle management system; according to the composite process list of each accessory group, matching with the existing manufacturing system resources, and selecting the most suitable resource equipment for the accessory group in the manufacturing system resources; and obtaining a corresponding composite process route according to the system resource equipment required to be used by each accessory group. By generating the accurate process list and route, the consistency and accuracy of th