Analyze the popularization obstacles of LCC technology in the green building, put forward the LCC technology modular promotion mechanism based on the percolation theory. This paper builds the permeability model of LCC technology application, propose the generation rules of LCC module. Combined with the LCC technical process and the principle of module partition, decompose the LCC process to form the LCC module. Build the LCC technology expert system. The research aims to promote the popularization and application of LCC technology in the green building.