An injection pump control system comprises a plurality of pressure feed mechanisms each thereof including inner cams, pump plungers, etc., and provided in a rotor, a separate fuel inlet passage provided for each pressure feed mechanism, an electromagnetic valve provided for each fuel inlet passage to open and close the same, an electric control circuit for making the number of open-close operations of each electromagnetic valve equal to the number of operations of each pressure feed mechanism and for controlling the duration of opening of the electromagnetic valves in accordance with the operating conditions of an engine.