The invention relates to an accurate control method for continuous rolling tension of bars and wires, and belongs to the technical field of steel rolling process methods. The control method is used for accurately controlling the continuous rolling tension of the bars and wires. According to the control method, the continuous rolling tension of a rolling line is quantitatively controlled by utilizing change of a loop lifting process and the accumulated speed change amount of a head rolling mill of a unit. The accurate control method has the beneficial effects that a method for quantitatively controlling the optimum value of the continuous rolling tension is found out according to the shape change in the loop lifting process and fluctuation comparison between the no-load speed of the rollingline head rolling mill and the full-line loading speed so that stability of the rolling process and product quality can be realized; the continuous rolling tension can be accurately controlled according to the change of the shape of a loop and the speed change of the rolling mill, the tension can be quantitatively judged, the precedent that the long-cycle tension of the rolling process is stabilized within a small fluctuation range is guaranteed, and the control method can be popularized in actual production of the bars and wires for a long time; and the method can be used for guiding steel rolling production, production accidents and quality fluctuation caused by improper tension control are avoided, and good economic benefits and popularization values are achieved.