The utility model relates to a multi-grade detonation control assembly for cable transmission perforation. The multi-grade detonation control assembly is mainly used for perforating a shale oil gas horizontal well in the development of an oil gas field. The assembly comprises a multi-grade monitoring detonating device on the ground, a hydraulic conversion device and a perforation gun, wherein the hydraulic conversion device and the perforation gun are connected with each other and are located under a well; the perforation gun is internally provided with a detection unit and a detonation unit; the multi-grade monitoring detonating device, the hydraulic conversion device, and the detection unit and the detonation unit in the perforation gun are conducted through multi-core transmission cable bypaths, wherein the hydraulic conversion device is composed of an upper connector and a lower connector. The function of a pressure switch is realized in a way that the assembly is switched-on/off under the hydraulic pushing of a long inserting needle and a connecting sleeve of the hydraulic conversion device; after the next grade of the perforation gun is detonated, the next grade of the perforation gun can be switched off and the last grade of the perforation gun is connected through the hydraulic conversion to realize the aim of detonating to perforate again, so that a plurality of perforation layers can be finished by placing a plurality of grades of gun strings and a plurality of the detonation units into the well for one time; and therefore, the aim of detonating to perforate for a plurality of times is realized, the underground working efficiency is improved, the labor strength of operators is reduced and the construction period is shortened.