The invention discloses a multi-crack-network perforator. The structure of the multi-crack-network perforator comprises a perforating gun body, a positioning disk, a gun carrier and perforating bullets. After the multi-crack-network perforator is applied to tight oil and gas reservoir perforation, multi-crack-network eyeholes are generated, the maximum stress concentration is generated, and reducing of formation fracture pressure for hydraulic fracturing in later period is easy to conduct. Perforation appropriate adjustment of stress concentration surfaces can be conducted according to different stratigraphic textures, and the multi-crack-network perforator is suitable for personalized perforation construction of wells with different stratigraphic textures.