The invention discloses a black start control system and method for the excitation system of a pumped storage power station and relates to the technical field of hydropower station black start. The black start control system and method solve a problem that a hydraulic generator can be automatically black started within preset time after being stopped by faults so as to rapidly restore the power supply of a power system, and are high in reliability and good in safety. The black start control system comprises a standby power supply, a monitoring system, an excitation system, and a hydraulic generator. The standby power supply, the excitation system, and the hydraulic generator are connected with the monitoring system. The standby power supply and the hydraulic generator are connected with the excitation system. After the power system powered by the hydraulic generator is subjected to power outage, a generator set with a black start capability is started to generate power and further drive the hydraulic generator without a black start capability to generate power, thereby gradually restoring the whole power system.