The invention provides a light photoelectric composite cable. The light photoelectric composite cable is formed after insulating layers are extruded through two conducting wire cores and an even number of signal line pairs which are formed by closely placing optical fiber wires and signal wire cores together, all the conducting wire cores are separated through the insulating layers, and all the signal line pairs are separated through the insulating layers. The light photoelectric composite cable has the advantages that electric power, electric signals and optical signals can be transmitted at the same time, mutual interference is avoided, the outer diameter is small, the weight is extremely low, the mechanical performance is good, using is fast and convenient, and the cost-performance ratio is high.