<p>A method for handling a slender ferromagnetic component by weak magnetic field is provided. The method comprises: the step for getting a slender ferromagnetic component going through a magnetic field provided by a weak magnetic handling device to apply the magnetic field to the component along the axis direction of the component, so that every volume element of the component is loaded magnetically; the step for getting the component out of the weak magnetic handling device, so that every volume element of the component is sequentially unloaded magnetically by self-adaption; the step for controlling the magnetic aging of the component to protect the weak magnetic signal of the component from being disturbed, so that a distribution feature of equipotential magnetic energy product is obtained.</p>
