Novel shielding structure and design method therefor

The invention discloses a novel shielding structure and a design method therefor, and mainly solves the problems of high cost and unsatisfactory shielding effect of the scheme in the prior art. According to the configuration of the novel shielding structure, closing coils are coaxially and mono-axially arranged; a high-magnetic-conductivity external shielding layer is arranged on the exterior of the coaxial arrangement group formed by the closing coils; the closing coils are connected in series, and are connected with a power supply; the design method comprises the steps of establishing an analysis model by the Biot-Savart law; establishing a coil magnetic field distribution model comprising the external layer magnetic conductive material boundary condition by adopting a mirror image model method; enabling the second-order equal-even order coefficient, the four-order equal-even order coefficient and the six-order equal-even order coefficient to be equal to 0 when x is equal to 0 through Taylor expansion, and