The utility model discloses a suspension insulator is low, wireless measuring device of null value resistance data, its characterized in that wireless transmitting device includes insulator spindle (1), data acquisition and emitter (4) through rotating flange (2) connection, first data sampling electrode (5), second data sampling electrode (6), data acquisition and emitter (4) are by sleeve pipe (4 -1) and the interior voltage sensor (4 -2) of sleeve pipe (4 -1), a divider resistance (4 -3), the 2nd divider resistance (4 -4), built -in emit antenna (4 -5) connects the constitution, the wireless?receiving device is including shell (7) that are equipped with liquid crystal display (8), power module (10), receiving module (11) be connected with receiving antenna (9), decoder (12), data processing module (13), the utility model is simple in operation, convenient, swift, application scope is wide, improves work efficiency, test safety, and reduce cost avoids power failure accident, and enhancing power supply reliability promotes the power supply service level, has very high economy and social.