The invention provides a flash spray control method and flash spray control equipment. The method comprises the following steps: determining whether flash spray is performed or not in the process of performing jet printing on adjacent jet printing objects between which a spacing exists, wherein the flash spray refers to instantaneous jet printing; and when the flash spray is determined to be performed, performing jet printing in the spacing between two adjacent jet printing objects according to the preset flash spray parameters by using nozzles comprising nozzles which are not used for performing jet printing on the jet printing objects on a sprayer at least. According to the method provided by the invention, the nozzles which are not used can be effectively maintained to be wet, so that the aim of protecting the sprayer is further achieved.