The invention relates to an electric quantity test instrument resetting method. The method comprises the following steps: storing valid signals of an electric quantity test instrument in a working state into a storage; detecting output signals of the electric quality test instrument and comparing the output signals with the valid signals stored in the storage; and if the comparison result is that the output signals are abnormal signals in a non-working state, outputting a resetting signal to a resetting circuit from a trigger, and carrying out automatic resetting by the resetting circuit. According to the method, the electric quality test instrument in an abnormal state can be reset automatically without extra operation of a user, and the use convenience and the stability can be improved.