The invention relates to a rapid fault detection method for a charger for an electric automobile. The technical characteristics are that the method includes the steps of dividing all tests into a test without load, a test with a rated load, a test with a random load and a test with variable loads, and then carrying out an experiment on the tests that need the same load in a unified manner. According to a standard test strictly, all charger fault detection tests are combined in an organic manner, and detection procedures are reasonably arranged on the basis of the real-time output state of a to-be-detected charger. In this way, a mode is prevented from being set repeatedly and a power supply is prevented from being turned on and off for the charger among the tests, a rapid fault detection function for the charger is achieved, and the detection time is shortened. Moreover, test procedures are simpler, the charger can function safely and highly efficiently, the power supplying reliability and the electric quality of a power grid are ensured, and the method facilitates large-scale popularization for electric automobiles.