Narrow pulse suppression method and device and bridge switch circuit

The embodiment of the invention provides a narrow pulse suppression method and device and a bridge switch circuit. The method is applied to a bridge switch circuit comprising at least one bridge arm, and each bridge arm comprises an upper switching tube and a lower switching tube which are connected in series. The method comprises the following steps: detecting whether a modulation wave original comparison value of a current period is in a preset narrow pulse interval of an upper switch tube or not, and if so, determining an upper tube adjustment interval to which the modulation wave original comparison value belongs currently; and adjusting the original comparison value of the modulation wave into the modulation wave adjustment comparison value corresponding to the current upper tube adjustment interval according to the corresponding relationship between each upper tube adjustment interval and the modulation wave adjustment comparison value. According to the technical scheme, under the condition that narrow