The invention discloses a method for obtaining measure quantity during fault occurrence of a direct current pole bus in a flexible direct current power grid. The method includes the following steps: when it is detected that a fault of the direct current pole bus in the flexible direct current power grid occurs, to-be-adjusted fault measure quantity of a converter and a direct current line according to significant bit and system unbalanced power of the converter and the direct current line in the monitored flexible direct current power grid. The method for obtaining the fault measure quantity during fault occurrence of the direct current pole bus is fast in speed, is high in efficiency and is short in time delay, and can improve the safe and stable operation level of a flexible direct current power grid project to a certain extent.