The utility model discloses a prevent mistake electrical power generating system based on high grounding, include isolation transformer and prevent the mistake power that still include the high grounding device of being connected with live wire output and ground wire output, it includes: the clamp plate is switched to ground connection, and first end is connected with the ground wire output, and the second end is connected with the live wire output, and the third end is connected with the first end of first resistance and the first end of second resistance. The second end of first resistance is connected with the first end of fourth resistance, and the second end of second resistance is connected with the first end of third resistance, the second end of second resistance and the second termination ground of fourth resistance. During a certain extreme point ground connection in the live wire, then the ground point that belongs to of the second end of second end and the fourth resistance of second resistance will produce abnormal signal. When no ground connection, can conveniently realize preventing electrical power generating system's trouble -locating by mistake to the assurance will prevent that mistake electrical power generating system's current potential restricts in normal scope, thereby guarantee the security in the operation detection who prevents mistake electrical power generating system.