Composite surge protection device detection method, surge protection device and storage medium

The invention discloses a composite surge protection device detection method, a surge protection device and a storage medium, and the method comprises the steps: obtaining initial resistance information of all gap units on at least two discharge branches in response to an initial sampling signal of a target surge protection device; acquiring current resistance information of all gap units according to a preset inspection period or in response to the inspection sampling signal of the target surge protection device; respectively comparing the relation between the current resistance information and the initial resistance information and the preset resistance threshold value, and judging the resistance state information of each gap unit; according to the resistance state information of each gap unit on each discharge branch, branch state information of each discharge branch is calculated; and determining the overall lightning protection performance of the target surge protection device according to the branch sta