The invention discloses an inrush starting current and transformer inrush current comprehensive inhibition method in a flexible DC transmission system and a realization device. The method comprises steps: the first minimum resistance value required for inrush starting current inhibition in the flexible DC transmission system is acquired; the second minimum resistance value required for transformerinrush current inhibition in the flexible DC transmission system is acquired; a larger resistance value is selected from the first minimum resistance value and the second minimum resistance value; ifa converter station connecting transformer line-side outlet is GIS, the resistor corresponding to the larger resistance value is arranged in an AC circuit breaker; and if the converter station connecting transformer line-side outlet is AIS, the resistor corresponding to the larger resistance value is arranged in the AC circuit breaker or is used as an independent resistor. The problem that the inrush starting current of the flexible DC transmission system and the transformer inrush current can not be subjected to comprehensive inhibition in the prior art can be solved.