The invention discloses a high-voltage narrow-pulse discharge and semi-dry process type cooperative pollutant control method and a high-voltage narrow-pulse discharge and semi-dry process type cooperative pollutant control device. The method comprises the following steps: (1) conveying dedusted flue gas to a high-voltage narrow-pulse discharge reactor through a flue gas inlet, and monitoring the concentrations of sulfur dioxide and nitric oxide at the flue gas inlet; (2) setting an energy input value of the high-voltage narrow-pulse discharge reactor according to the concentrations of the sulfur dioxide and the nitric oxide, and oxidizing and degrading the dedusted flue gas in the high-voltage narrow-pulse discharge reactor; (3) conveying the oxidized and degraded flue gas into a semi-dry process desulfurization system, absorbing or adsorbing the flue gas by quick lime or slaked lime, and removing original pollutants and newly-generated pollutants. Through the method and the device, a plurality of pollutants can be cooperatively removed. The method and the device have the advantages of high removal efficiency, flexibility in regulation, simple system, small occupied space and low investment.