[Purpose/significance]With the development of ear, college libraries are required to have more and better functions, and its inner space design becomes more important.[Method/process]The paper refers to different features of some advanced college libraries at home and abroad, takes the inner space construction of the library in Beijing Vocational College of Agriculture as an example, and discusses the crucial aspects that should be taken into consideration in inner space design and its importance.[Result/conclusion]This paper puts forward the design strategy of “six emphasis” and influential factors of “four cultures” in the improvement of inner space design of college libraries.