The invention provides a method and a device for protecting lightning intrusion waves at a VSC DC converter station. The main wiring diagram of the VSC DC converter station, equipment parameters, theconductor and tower are used to calculate the electromagnetic transient model, it is possible to accurately calculate that when a counter-strike and a winding strike occur at the converter station, the overvoltage distribution of lightning intrusion wave on each equipment, and the corresponding protection scheme is proposed according to the calculated overvoltage. The protection scheme includes adjusting the number of lightning arrester posts and the arrangement position of the lightning arrester, etc., which has important application value for improving the lightning protection capability ofthe VSC converter station and optimizing the design level.