SUMMARY
In the article an actual scientific and practical problem of complex economic systems integration modelling was settled and solved, in which a complex economic and mathematical models of the creation process’ of integrative structures of various shapes, which enhances the efficiency of decision- making and functioning of the integrated system.In the article is proposed the concept of modelling the integration processes of complex economic systems, which can reduce the risk of inefficient management decisions and maximize profits by improving the consistency of information on parameters of the system. The thesis present a model system characteristics of integrated complex economic systems, the project model of organization and effectiveness of the integrated structure and dynamics model of system integration process, allowing mostly evaluate the impact of certain factors on the system behaviour and predict future values of key factors.Keywords: integration; complex economic systems; economic and mathematical modelling; project management