The utility model relates to a cabinet body of a module unitization direct current power supply cabinet, which comprises a basic cabinet body and various modular units, the cabinet body is characterized in that a plurality of cross beams are installed on the positions on both sides of the basic cabinet, which have different heights, slide ways are fixedly installed on the cross beams, the various modular units are respectively arranged on the slide ways and are fixedly installed with the cabinet body. The utility model has the advantages that: firstly, the design integrates the functions of operating, controlling, protecting, communicating and the lighting power supply of accidents into a whole, the integral structure is simple and the inner connection is simple and convenient, secondly, the versatility is strong, thirdly, the cabinet body has rapid reaction speed to accident information, once accidents occur, the maintenance is convenient, fourthly, the workload of maintenance is small, fifthly, since mounting holes are respectively arranged on the front panel of each of the modular units, which is convenient for installing on the cabinet body, and the installation is simple and firm.