Based on geometric model of multiple parallel flow evaporator set up air conditioning, multi-louvered fin for the study of the parallel flow evaporator, louvered fin evaporator model by using ANSYS15.0 software for numerical simulation study of parallel flow evaporator shutters louvered fin thickness fin heat transfer and flow performance of, and five types of structure at different Reynolds numbers Shi Chuanre and liquidity can be evaluated.