The invention belongs to the field of nuclear technologies, and in particular relates to a pulse type halogen gas detection method and pulse type halogen gas detection equipment for iodine adsorber leakage detection, which are used in a nuclear facility air purification system. The pulse type halogen gas detection method comprises the steps of: (S1) injecting a halogen gas into a ventilation pipeline at the upstream of an iodine adsorber in a pulse mode; (S2) measuring halogen gas concentrations in the ventilation pipeline at the upstream and downstream of the iodine adsorber separately whileinjecting the halogen gas; (S3) and comparing the halogen gas concentrations in the ventilation pipeline at the upstream and downstream of the iodine adsorber, so as to obtain a leakage rate of the iodine adsorber. The pulse type halogen gas detection method and the pulse type halogen gas detection equipment have the advantages of short testing time, low halogen reagent consumption, and environment friendliness.