The invention discloses a branch wire clamp capable of being separated quickly, which comprises a wire clamp unit, the wire clamp unit comprises a support and a sliding frame connected with the support, the support comprises a connecting piece, a first snap ring connected with one end of the connecting piece and a fixed seat connected with the other end of the connecting piece, and a through holeis formed in the fixed seat; a separation unit which comprises a sliding rod located in the through hole and an annular piece connected with the sliding rod, wherein the sliding rod penetrates throughthe through hole; and a telescopic unit which comprises a rotating piece rotationally connected with the sliding frame and a stud connected to one end of the rotating piece, wherein a screw hole is formed in one end of the sliding rod, and the stud is connected with the screw hole. When power-off operation is needed, the branch wire clamp can be rapidly loosened, the separation effect is achieved, the arranged telescopic unit can be adjusted according to the thickness of a wire, and the device can be connected more firmly.