The invention relates to a self-adjusting torque device, comprising a driving module, a driven module and an adjusting module; wherein, the driving module is connected with power input equipment; the action force of the driving module is a first tensile force generated by the power input equipment; the driven module is connected with coiling material; the action force of the driven module is a second tensile force which is applied to the coiling material; the adjusting module is connected with the driving module and the driven module and adjust the distance between the driving module and the driven module according to the second tensile force so as to lead the second tensile force to be consistent to the first tensile force. The self-adjusting torque device can realize stable tensile force applied to the coiling material and leads the material supply or recovery to have exact precision.