The invention discloses a method for interior design based on BIM, which comprises the following steps: measuring data, analyzing data, drawing sketch, preliminary design, outputting model, scheme combination, model rendering, effect display and actual decoration; A sketch is first made by a CAD, The preliminary design is then provided to the customer, preliminary design intent is obtained, CAD template drawing is processed through BIM modeling, the model of each stage and the total model are obtained, to give customers a more intuitive visual experience, and consult again to repair the model,avoid errors, After the scheme is confirmed, the BIM model can be rendered and the virtual display equipment can be used to display the full range of the effect to the customer, so that the customercan feel the actual effect more clearly and the customer's ideas can be combined with the reality. At the same time, the design, building materials and home supply chain can be presented to the customer together to save customer's time.