Abstract: Petrochemical industry is developing toward the refinery and chemical integration. Intensive development is the primary competitive advantages of a large refinery and chemical integrated base. It is featured by the capital value improvement and resource utilization efficiency enhancement. This paper studied the planning scheme of a large refinery and chemical integrated base comprehensively with two optimized proposals for phase Ⅱand phase Ⅲ separately, and a conclusion is that developing and extending petrochemical industry chain will be the right way to differentially develop the base，which will be beneficial to balance the relationship of intensive development and scale expansion.

Key words: integration, capital value, resource utilization, intensive development