The invention discloses a rigid-system falling-off-type bus-bar suspension device guiding slipping mechanism which comprises a guiding mechanism and a bus-bar suspension mechanism. The bus-bar suspension mechanism comprises a falling-off suspension cable clamp and a connecting mechanism connected with the falling-off suspension cable clamp. When the connecting mechanism is separated from the falling-off suspension cable clamp, a bus-bar falls off from the falling-off suspension cable clamp; the guiding mechanism is connected to the connecting mechanism and can drive the connecting mechanism to move relative to the falling-off suspension cable clamp so that the connecting mechanism can be separated from the falling-off suspension cable clamp; the guiding mechanism is connected with a flood gate, when the flood gate is closed, the guiding mechanism is triggered to drive the connecting mechanism to separate. According to the rigid-system falling-off-type bus-bar suspension device guiding slipping mechanism, the touching-type mechanical linkage and automatic falling-off in-place rotating functions can be achieved, and the safety and reliability are achieved.