The invention discloses a three-phase adjustable polarity test meter which comprises micro-ammeters and adjusting resistors. Three groups of micro-ammeters and adjusting resistors are arranged. Each group of micro-ammeter and adjusting resistor share the same size. The micro-ammeters and adjusting resistors are connected in parallel. One end of each micro-ammeter is connected to form a wiring terminal N, and the other end is respectively wiring terminals A, B and C. The micro-ammeters and resistors on the secondary side of a transformer are connected in series to form loops. According to the invention, the structure is simple and durable; three groups of micro-ammeters are arranged; previously, three times of pulse current are applied to determine the test phase, while pulse current is applied only once at the present; three-phase induction current is simultaneously observed to directly judge whether the test phase is correct; and the test accuracy and the test efficiency are improved.