Based on the improved non-competitive input-output model, this book first proposes a method to accurately measure the international division of labor status of a country's high-tech industry on the basis of solving the problem of "statistical illusion", and empirically measures the performance differences of China's high-tech industries and regions. Secondly, based on the measurement method of the status of international division of labor, a theoretical framework of the main factors affecting the international division of labor status of high-tech industries in developing countries is constructed from the perspective of internal dynamics, and empirical tests are carried out. Thirdly, a path selection model for developing countries to achieve "leapfrogging" progress in their own technological level through the interaction of advanced industrial transfer stage, technology absorption capacity improvement and self-technology research and development accumulation is constructed, and then improve the international division of labor status of their own industries. Finally, taking the Pinghu Opto-Electromechanical Industry Cluster and China's high-speed railway technology introduction as an example, a typical case analysis is made on the status of China's high-tech industry in the international division of labor and its upgrading.(AI翻译)