The invention discloses a dynamic reactive compensation configuration method for lowering a multi-infeed direct current commutation failure risk. The method specifically comprises the steps of beforedynamic reactive compensation configuration optimization is carried out, firstly establishing a direct current distance coupling degree index; determining a weak region and a key fault of system dynamic reactive compensation; then establishing a commutation failure risk lowering effect index and a dynamic reactive compensation sensitivity index; when a reactive configuration optimization model forlowering the direct current commutation failure risk is solved based on a MOEA/D algorithm, by taking the commutation failure risk lowering effect index and the reactive compensation cost as objective functions and adopting hybrid encoding for variables, optimizing locations and capacities of dynamic reactive compensation apparatuses at the same time to obtain a Pareto optimal solution set; and by adopting an entropy weight method, obtaining an optimal compromise solution. The distribution points and the capacities of the multiple dynamic reactive compensation apparatuses in a large power grid can be optimized at the same time; and under the same dynamic reactive compensation cost, the effect of lowering the multi-infeed direct current commutation failure risk is better.