Traditional calculational models for similarities between case properties lack the adaptability to imprecision information in an uncertain environment, therefore, based on case-based reasoning (CBR) principle, and determination method for real case similarity and combined calculation method for properties weight were studied. A similarity computation model among interval value and an objective method based on the deviation information of similarity values among properties were proposed. CBR principle was applied in design of precision spade punch planter of maize. IDEF0 method was adopted to disassemble design procedure. The nearest-neighbor case retrieval strategy was used to accomplish case retrieval. Then, the retrieved case was modified to meet the needs of the design. Three-dimensional parameterized model was developed, and dynamic simulation was carried out for design scheme by using Pro/E, which verified effectiveness and feasibility of the design. 