Abstract: Financial networks is the circular flow of funds in an economy. In References^[1-8] the model of financial networks have been researched.In this paper,we propose an improved model about assets,liabilities,appropriate sizes and prices,based on the financial networks models in references^[1-8].This new model considers for all sectors the risks of financial instruments,the constraints for economic resource in financial networks,the constraints for the accountings of assets and liabilities. The improved model is more appropriate for application.We use the evolution programming algorithm to make simulations.

Key words: financial networks, assets, liabilities, investment size, value ptimization,simulation