Abstract: It is very difficult to accurately calculate and separate the longitudinal force about the strain sensor under dynamic loading conditions for mine multi-rope tension test system.In order to solve this problem, combined with the structure characteristics of sensor about big load of low altitude, this paper had carried out an experimental study, analyzed the static decoupling effect under the longitudinal stress conditions by using the least square method and the method of independent component.The results show thatX, Y direction and Z direction MZ coupling rate values were smaller, independent component was 0.01%, the least squares method was 1%.This paper studied the dynamic decoupling by independent component and diagonal dominance compensation.The results showed that the influence of coupling between the dimensions met the requirements, but the output signal amplitude of diagonal dominance compensation was about 0.9, and the output signal amplitude of independent component was about 1.Studies showed that the calculation and extraction of the longitudinal force of mine hoisting cable line strain tension sensor by independent component theory are of high precision, nearly complete decoupling.