The invention discloses a branch module type prefabricated optical cable, which is composed of a module box and branch optical cables in an integrated manner, and is characterized in that one side of a box body is provided with a plurality of first fixing holes, a panel side of the box body is provided with a plurality of second fixing holes, the plurality of branching device type prefabricated optical cables can be arranged in the first fixing holes in a penetrating manner by branching devices and are fixed on the box body, a plurality of LC adapters are arranged in the second fixing holes of a panel in a penetrating manner, and the branch optical cables carry out tapping in the module box and are tapped to different adapters of the panel of the module box. According to the invention, optical cable prefabricated branches are packaged in a module before leaving the factory, plug-and-play modular installation is supported, and switching can be carried out according to requirements. In addition, standby cores are stored in the module, and exposed cables in a cabinet are reduced.