A momentless solenoid is a combination of two sets of solenoids in a nested manner, and through each set of coils a certain number of turns and a certain current direction, the magnetic field outside the solenoid is rapidly attenuated. The total magnetic moment of the coil is zero. Its main features and advantages are: it will not produce magnetic interference to the environment at a certain distance during work, and will not magnetize nearby magnetic substances; especially prominent is the use in a magnetic shielding cylinder, which can combine the magnetic shielding layer with the magnetic field of the coil. The mutual influence is reduced to a negligible degree.