The invention relates to a power supply mode selection method of an area without electricity supply based on a load distance and a load characteristic. Based on a survey of a present situation of the area without electricity supply, an appropriate power supply mode is provided. Each mode lists each characteristics and a suitable scope. The method is characterized by: measuring and calculating load and line power supply distances of the area without electricity supply; calculating and determining whether the distances satisfy a load distance requirement; determining the corresponding power supply mode according to the load and the load characteristic. By using the method, a set of selection process of the power supply modes of the area without electricity supply can be established. A selection difficulty of the power supply modes of the area without electricity supply can be substantially reduced. A feasible scientific technology which can solve a power supply problem of the area without electricity supply can be provided. In the invention, the method is combined with the actual area without electricity supply. The area without electricity supply and a power distribution network of the adjacent power supply area can be deeply analyzed. A bottleneck of implementing power grid extension power supply can be found and a power supply problem of the area without electricity supply can be effectively solved.