This paper constructs a two‐sector growth model with heterogeneous labour, to explore the impact of the economic integration on growth and income distribution. There are two sectors in each country, including the consumption‐good sector and the R&D sector. We suppose that the R&D sector produces new blueprints or ideas for these innovations, and hence provides the engine of growth. Assume that the talent's distribution of workers is the uniform distribution. We show that the economic integration will stimulate the developing countries' economic growth and then decrease its income inequality. In addition, we also demonstrate that if the growth rate of the advanced country rises after the integration, then income inequality of that will increase, and vice versa.