The invention provides a method and a system for starting a wind power converter. The method comprises that an auxiliary converter detecting device precharges a DC bus of a wind power converter untilthe voltage of the DC bus reaches a preset anti-shock voltage value; the auxiliary converter detecting device performs constant current charging on the DC bus until the voltage of the DC bus reaches apreset safe starting voltage value, and the preset safe starting voltage value is constantly outputted to the DC bus; a converter controller detects whether a power module and a brake circuit have faults; and if neither the power module nor the brake circuit fails, the converter controller controls the wind power converter to start. When the converter controller performs fault detection on the power module and the brake circuit, explosion or other safety hazards can be effectively prevented.