The invention provides a method for testing fault ride-through of a high-low voltage continuous process, and the method comprises is based on a high-low voltage ride-through capability detection system for a wind generator set. The method comprises the following steps: I, generating the continuous output power grid voltage drop and voltage rise through the high-low voltage ride-through capability detection system for the wind generator set; II, obtaining non-electrical quantity data and electric quantity data during high-low voltage fault ride-through; III, processing the non-electrical quantity data and electric quantity data; IV, analyzing the non-electrical quantity data and electric quantity data. The method can simulate the voltage drop and rise characteristics of a power grid continuously and truly, guarantees that the changes of a voltage phase angle and the quality of electric energy are consistent with the fault characteristics of the power grid, and can achieve the continuous detection of low-voltage and high-voltage ride-through capabilities of the power generator set in one testing process.