The invention relates to a puncture cable lug for connection of power cables and discloses a cable lug device which is used for connecting the cables without peeling through matching of multiple puncture pieces and conductive silicone sheets. According to the puncture cable lug, peeling is not required, operation is simpler, the use effect is better, cable cores with different lengths can make sufficient contact with the cable lug, and the conduction effect is improved. The puncture cable lug is characterized in that one end of a connecting piece is arranged at one end of a main cylinder, a mounting hole is formed in the connecting piece, the connecting piece and the main cylinder are made of copper, a conductive silicone sheet is arranged on the inner wall of one end of the main cylinder,a thread is formed in the outer wall of the main cylinder, a rotating sleeve is nested on the main cylinder, a thread is formed in the inner wall of the rotating sleeve and meshed with the thread inthe outer wall of the main cylinder, a pressing sleeve is nested on the main cylinder, one end of the pressing sleeve is connected with the rotating sleeve, the inner diameter of the pressing cylindergradually increases from one end to the other end, and an annular limiting block is arranged at the other end of the pressing sleeve.