The invention discloses a bus bar which is used in low-voltage complete equipment, and particularly relates to a dual C-type bus bar. The dual C-type bus bar comprises two C-type bus bar main bodies of which the opening directions are opposite, wherein one back part is shared by the two C-type bus bar main bodies, and the two C-type bus bar main bodies and the back part which is positioned between the two C-type bus bar main bodies are of an integrated structure. By adopting the structure, the two C-type bus bar main bodies and the back part which is positioned between the two C-type bus bar main bodies are of the integrated structure, the back part is shared by the two C-type bus bar main bodies, thus the bus bar installation space is saved by adopting a bus bar system when the current of a power distribution system is larger, the working intensity of a worker is relieved, the installation time is saved, the installation of the bus bar is convenient, and the current carrying ability is enhanced; and meanwhile, a slot at the front side or the rear side can be selected to be connected with a switch or other cabinet bodies when the bus bar is in installation, and the installation of the bus bar can be convenient and flexible.