BIM technology has developed rapidly in recent years and it also was successfully introduced to Hei Xiazi Botanical Garden in early architectural design.CFD technology is widely used in the architectural design of building wind environment.The thesis is focus on the introduction of the application of CFD technology combination with BIM technology.The building wind environment out side, the indoor natural ventilation and the indoor air flow field were calculated out by CFD software package.According to the computation results, Hei Xia-zi building layout was adjusted dynamicly to optimize the design.Meanwhile, according to CFD calculation of indoor temperature and humidity fields and checking the conditions of plant growth needs, the local air conditioning technology was used to save energy.