交易方式是生产资源配置和商品实现的最基本方法， 随着社会生产力和流通力的发展，传统交易方式已经有了重大的突破，而网上交易的出现、发展，更是交易方式的新创造。本文在交易方式的理论阐述基础上，着重对网上交易的优势、难点作了分析，并从选择与优化的角度，提出了促进网上交易方式扩展的若干对策 The mode of transaction is the most basic method for the allocation of production resources and the realization of commodities. With the development of social productive forces and circulation power, major breakthroughs have been made in the traditional transaction modes. The emergence and development of online transactions are also the new creation of transaction modes. Based on the theoretical explanation of transaction methods, this paper analyzes the advantages and disadvantages of online transactions and puts forward some countermeasures to promote the expansion of online transactions from the perspective of selection and optimization