The invention provides a sliding-type bus-bar joint and belongs to the technical field of machinery, and the sliding-type bus-bar joint can be used for solving the technical problem that the existing bus-bar joint is not capable of automatically enabling a connection section connected to the bus-bar joint to be separated from the bus-bar joint. The sliding-type bus-bar joint comprises a power supply arm bracket provided with a sliding cavity; the sliding cavity of the power supply arm bracket is internally provided with a static joint and a dynamic joint which are used for connection; the static joint is fixed in the sliding cavity of the power supply arm bracket; the dynamic joint is internally provided with a mounting part; and the dynamic joint is provided with a linking device used for enabling the dynamic joint to slide toward the static joint. The sliding-type bus-bar joint has the advantages of being safer in use, higher in automation, more labor-saving in operation and the like.