The utility model discloses a system for multichannel power frequency electric field measurement is used for carrying on under high humility condition: 1 at least electric field measurement unit, electric field measurement unit include capacitive sensor, measuring circuit and casing, and capacitive sensor and measuring circuit are installed in the confined casing, and the interior filling liquid insulating material of casing solidifies, capacitive sensor is used for the while to measure the electric field weight of mutually perpendicular's three direction, acquires and measures on -the -spot electric field strength, the electric field measurement unit passes through the wireless communication unit with electric field strength data transmission to host computer, electric field strength datathat 1 at least electric field measurement unit the sent line display that goes forward side by side is received to the host computer. The host computer reaches the computer on with electric field strength data test result, and the computer is right the electric field strength data are saved and are shown in real time. The utility model provides a system can reduce the high -humidity environmentinfluence, and that realizes multiple spot, high accuracy carries out synchronous measurement to the power frequency electric field.