The invention provides a high-voltage power cable spacing technology, particularly a power cable spacing clamp. The power cable spacing clamp is characterized in that two spacing pieces are arranged and combined to form an annular spacing piece; antiskid teeth are arranged on the inner wall of the annular spacing piece; the outer wall at one end of each of the two spacing pieces is connected by soft sheets, and the other end is provided with corresponding connection lugs; connecting holes are formed in the connection lugs; and a bolt is connected with a screw cap after penetrating through the connecting holes. The sleeve and the spacing pieces are made of light plastics with sound insulation, so the clamp is sleeved to the power cable when in use; then, the bolt penetrates through the connecting holes in the two connection lugs; and the sleeve or the spacing pieces are fixed by a nut. To fit the power cables with different section sizes, the inner diameter of the cable clamp or the sleeve can be made into a variety of sizes and specifications. And therefore, the power cable spacing clamp has the advantages of simple operation, convenience in installation and operation, safe and reliable power transmission and the like, and is particularly applied to use in areas with thoroughly dense power cables such as cable tunnels, cable channels, cable interlayers and cable shafts, etc.