Shenzhen is an export-oriented developed city in China. After Shenzhen's per capita GDP reaches 500 dollars, it has become a very urgent and realistic problem for Shenzhen to import and export, use foreign capital and invest abroad to meet the needs of this transformation and better promote the development of the national economy. This paper uses Deng Ning's investment development cycle theory to analyze the relationship between national economy, especially the development of international trade and international investment.

It is believed that the investment cycle theory is also applicable to export-oriented cities, and the positive correlation between Shenzhen's GDP, utilization of foreign capital, investment, import, utilization of foreign capital, export and foreign capital is demonstrated, and it is judged that Shenzhen is in the third stage of investment development cycle. At the same time, according to the general characteristics of the third stage of the investment development cycle, this paper analyzes the countermeasures for developing Shenzhen's international trade and investment, that is, mainly improving the product and technology content, the internalization advantage and the location advantage with high concentration of creative assets, and puts forward some operable suggestions.

Applying the investment development cycle theory to urban analysis is an attempt of this paper. This paper analyzes the current international trade and investment countermeasures to promote the development of Shenzhen's national economy.

This paper is a beneficial exploration to the theory of investment development cycle and the practice of Shenzhen's export-oriented economy.

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