Abstract: The ingredients of equation for building shape coefficient contain length, width and height. Integrating the length and width, it forms the dimensions of first floor for the building. Simulating and analyzing by DesignBuilder, it was found that:the building plane-shaped coefficient and its first floor area were closely related with the energy consumption. The building energy consumption was directly proportional to the building plane-shaped coefficient, and inversely proportional to the first floor area. In addition, the equation of the building's plane-energy-consumption coefficient was formulated in this work. In order to research the distribution characteristics of plane-energy-consumption coefficient for the traditional dwellings in Sizhai village at the macro level, the distribution rules and statistical characteristics of dwellings with beeline-shaped plane, L-shaped plane, concave-shaped plane and shaped plane in each subregion were analyzed by G.E. respectively. Besides, utilizing the derived equation, the plane-energy-consumption coefficients for dwellings were computed for each subregion. Based on these statistical data, the conclusion was made that:the energy saving of building with rectangular-ambulatory-plane-shaped plane was the best, followed by cancave-shaped plane,L-shaped plane, beeline-shaped plane.