MBSE-based system modeling entity model library construction method and system

The invention provides an MBSE-based system modeling entity model library construction method and system, and the method comprises the steps: a model element construction step: constructing corresponding model elements in a system modeling entity model library according to the characteristics of each specialty during system modeling; a model library framework construction step: constructing an overall framework of a system modeling entity model library according to the model elements; an entity model library construction step: constructing an entity model library based on the overall framework; the model elements include system elements describing the system/subsystem, functional design elements, active design elements, and parameter design elements. According to the method, the tradeoff decision points which need to be supported by the model library are provided in the establishment process of the system model, so that the collaborative modeling and design efficiency is improved, the model reuse rate is impr