Abstract: In the first half of the 21st century, urban agglomerations on various spatial scales will play an important role in China's socio-economic development, and provincial urban agglomerations are bound to become the major basis of the province development strategy. Based on the study on the cohesion and outreach of Zhongyuan urban agglomeration, the paper deepens the integration theory of provincial urban agglomeration. The conclusion as follows: 1) Cohesion means to create the modern metropolitan area, and build core growth pole to drive the rapid development of urban agglomeration. Outreach means to create modern provincial urban system, and build regional support system to host the healthy development of urban agglomeration. 2) The Zhongyuan urban agglomeration comprises the four industrial zones and developmental axes. 3) Zhongyuan urban agglomeration cohesions in the municipal district of Zhengzhou-Kaifeng, which can be divided into five functional regions. And the construction of industrial zone in Zhengzhou-Kaifeng should be gone firstly as the important ingredient of the key functional region. 4) Zhongyuan urban agglomeration outreaches in the urban system of Henan Province, which has two intensive projects of building platform for the urbanism and brought its whole functions into play. And 5) in the strategic planning of Zhongyuan Economic Zone, Zhongyuan urban agglomeration is still the major distraction slabs, which integration, cohesion and outreach will give important support for Zhongyuan Economic Zone and play a key role on national development.