A high-efficient and strain-prevention hard cable wiring device comprises a cutting assembly, a movable plate, a moving and drawing assembly, a fixing and clamping assembly and a cable case. The moving and drawing assembly is arranged on the movable plate, and a coil is fixed in a coil disposing device through the coil disposing device and an end cap to prevent loosening and falling off of the coil. A motor drives a leading screw to act, and the coil in the coil disposing device realizes paying off of cables. The process requires no manual carrying and rolling of the coil, thereby reducing workload and labor intensity, and preventing hand strain due to manual stretching. The tail end of the coil can be clamped by the fixing and clamping assembly, and the two ends of the cable do not have to be tied, thereby preventing repeated stretching of cables, and improving work efficiency. Through cooperation between a cutting knife on a pressure plate and a tool rest on a fixing plate, a cable can be stretched and cut in fixed length, thereby realizing simultaneous stretching and cutting. The length uniform degree of the cut cables can be ensured.