The invention relates to a method for dynamically adjusting parameters of a current inner loop controller. The method comprises steps of 1) determining the minimum and maximum values of the proportional coefficients and the integral coefficients of d-axis channel and q-axis channel current inner loop controllers on the premise of not causing high-frequency oscillation according to the strength ofa connected AC system and the dynamic response speed requirement of a flexible DC converter station, to obtain a parameter dynamic adjustment range; and 2) according to a maximum error value that mayoccur between a reference current and an actual current and the parameter dynamic adjustment range determined in the step 1), dynamically adjusting the proportional coefficients and the integral coefficients of the current inner loop controllers by a preset controller parameter adjustment rule, to obtain the optimal values of the proportional coefficients and the integral coefficients. The methodcan be widely used for the dynamic adjustment of the parameters of the inner loop control system in a flexible DC transmission engineering, and can reduce the risk of high-frequency oscillation of theflexible DC engineering and improve the operational stability of the flexible DC engineering under the condition of satisfying the steady state characteristic, the dynamic characteristic and the transient response characteristic.