Application of BIM technology in building decoration projects is the last step to realize the whole life-cycleBIM technology application process.It is significant to study the application process of BIM technology in public building decoration projects for facilitating the realization of green building.Based on the previous research, relevant literature, engineering practice and industrial interviews, the author summarizes and improves the details of decoration engineering application of BIM technology at each stage, which providesreference for BIM technology application process in public building decoration projects.