The frequent modification, complexity and time limited on the course of construction drawings for building structure give the design staff a lot of pressure. At the same time, the highly approximate expression of detail and openness provides the feasibility of high efficiency to design staff, which makes the modification to reference map information reasonably and quickly. A new method was proposed and illustrated to check reinforcement ratio for restrain boundary part of concrete wall automatically and quickly, using program developed by AutoLISP language on the basis of in-situ graphic information identification under surrounding of AutoCAD entirely. Compared with other software, the method's advantages is good replication, strong adaptability, convenient, fast and so on, and it has a certain practical value.