▎ 摘　　要

NOVELTY - Magnetic field intensity measuring device has a cylindrical container (1) whose end is provided with a light source (2). One end of the top part of the cylindrical container close to the light source is installed with a non-deformable material (4) through a connecting arm (3). One side of the non-deformable material close to the cylindrical container is provided with a ultra magnetostrictive material rod (5). The non-deformable material is provided with an ultra magnetostrictive material connecting part that is connected with a connecting rod. One end of the cylindrical container far away from the light source is provided with a light detector. USE - Used as magnetic field intensity measuring device. ADVANTAGE - The device: drives the lightweight lever to stretch graphene film to make the noble metal particle distance change by the magnetic field caused by the deformation of the giant magnetostrictive material and finally causing the change of the transmitted light; and obtains the magnetic field intensity according to the change relation, so as to have high sensitivity and high precision. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the magnetic field intensity measuring device. Cylindrical container (1) Light source (2) Connecting arm (3) Non-deformable material (4) Ultra magnetostrictive material rod (5)