Fenghuang Miao minority’s housings have been clearly divided into two types in the previous series of researches, and it is one of the main theoretical basis of this paper. Furthermore there are recess entrance porches and overhanging eave spaces between interior and exterior spaces in Miao minority’s housings, and it is the Miao minority housings’ regional characteristic. The important characteristic is analyzed in this paper basing on past researches. The recess porches are low and deep in Type 1, and high and shallow in Type2. The recess porches and overhanging eaves were changed relatively, the recess porches got shallow and the eaves got deeper from Type 1 to Type 2. Through the analysis of the changing from the linear pattern to curve pattern cantilever beams and their characteristics, it is defined that the curve pattern cantilever beams are the effective and native characteristic constructions, which made the eaves get expansion.