Connecting device of mining soft moving type direct current cable and using method of connecting device

The invention relates to the technical field of cable installation, in particular to a mining soft moving type direct current cable connecting device which comprises a base, the base is horizontally arranged and moves horizontally in the length direction of a mine hole, the base is provided with a rolling mechanism, the rolling mechanism is used for achieving horizontal displacement of the base, and the base is provided with an unwinding mechanism. The unwinding mechanism comprises a driving motor and an unwinding roller, the unwinding roller is rotationally borne on the base, the driving motor and the unwinding roller are coaxially arranged, the base is further provided with a cleaning mechanism, the cleaning mechanism is located at the rear end of the unwinding mechanism and used for cleaning a cable, and the front end of the base is further provided with a sweeping mechanism. The sweeping mechanism comprises a rotating roller, a bucket and a collecting box, the rotating roller is rotationally borne at the