The utility model relates to a power distribution control apparatus in an electric power system and discloses a control cabinet capable of conveniently arranging indication boards. The control cabinet comprises a cabinet body and a cabinet door. A groove is arranged on the doorframe of the cabinet body. A carriage is arranged inside the groove. The carriage is hinged to the two side walls of the groove through a pin. The carriage main body comprises a stop block and a support block. The lower end of the support block is provided with a lower jacking wheel. The lower jacking wheel is a cam opposed to the pin. The lower end inner side of the groove is provided with a spring cooperating with the lower jacking wheel. The upper end of the support block is provided with an upper jacking wheel. The inner part on the lower end of the stop block is provided with a jacking wheel track recessed inwards. The track face of the jacking wheel track is composed of multiple cambered surface segments which are connected in a smooth transition way. The lower part of the upper jacking wheel is hinged to the lower end of the stop block through a spring shaft. The upper jacking wheel is located inside the jacking wheel track and elastically cooperates with the recessed face of the jacking wheel track. The inner sides of the stop block and the support block are respectively provided with corresponding grooves. When in use, the carriage is taken out to form a right-angle lug which supports a horizontal label. When out of use, the carriage is conveniently pressed in to be aligned with the panel of the cabinet body. The control cabinet is thus nice-looking.