In view of the traditional high voltage business expansion project access system scheme design, under the condition of the circuit load conditions allow, usually the method only putting the distance between power source and the electric point as the single reference standard is of limitation.The paper put forward the new method that is the construction funds and construction period as the constraint condition of a high voltage power supply business expansion project scheme optimization design method.The optimal power supply scheme is determined by considering the influence of daily profit value, line length and line type.