Motor with demagnetization resistance and compressor

The invention discloses a motor with demagnetization resistance and a compressor. The motor comprises a stator iron core, a rotor iron core installed in the stator iron core and a plurality of permanent magnet groups installed in the rotor iron core. A plurality of convex teeth are arranged on the stator core; the rotor core is provided with a plurality of flat surfaces and arc surfaces; the gear is characterized in that the width size of the arc section on the convex tooth is W2; the width size of the arc surface on the rotor iron core is W1, and the air gap between the flat surface and the imaginary arc surface of the rotor iron core is g2; the air gap between the convex tooth arc surface and the arc surface on the rotor iron core is g1; g2/g1 is larger than or equal to 1.5 mm, W1 is larger than or equal to W2, and g1 is larger than or equal to 0.6 and smaller than or equal to 0.8 mm. According to the invention, g1 is greater than or equal to 0.6 mm and less than or equal to 0.8 mm, so that the electromagne