The invention provides a resonant type pre-charging circuit for a high-voltage frequency converter. The resonant type pre-charging circuit is characterized by comprising an auxiliary winding, a three-phase capacitor bank, a current-limiting resistor bank, an alternating current contactor and a three-phase alternating current low-voltage power supply, wherein the auxiliary winding is arranged on the secondary side of a rectifier transformer; on the one hand, three ends of the three-phase capacitor bank are connected with the auxiliary winding, and on the other hand, the three ends are connected with the three-phase alternating current low-voltage power supply through the current-limiting resistor bank; and the alternating contactor is arranged between the current-limiting resistor bank and the three-phase alternating current low-voltage power supply. The three-phase capacitor bank is connected in parallel between the auxiliary winding and the current-limiting resistor bank to ensure that the three-phase capacitor bank and each phase line winding on the auxiliary winding form an LC oscillation circuit and the LC oscillation circuit formed by the three-phase capacitor bank and the auxiliary winding generates a magnetizing current to the rectifier transformer, so problems of great circuit consumption, high cost, low efficiency and the like caused by a higher power consumed by the magnetizing current on the current-limiting resistor are solved.