The invention discloses potassium magnesium titanate. The potassium magnesium titanate comprises a composition of which a molecular formula is K0.8Mg0.4Ti1.6O4; the potassium magnesium titanate has characteristic diffraction peaks at the 2theta angular positions of 11.2+/-0.3 degrees and 29.2+/-0.3 degrees in an XRD spectrum; and the peak intensity of a diffraction peak when the 2theta angle is 29.2+/-0.3 degrees is greater than that of the diffraction peak when the 2theta angle is 11.2+/-0.3 degrees. The potassium magnesium titanate has the characteristic of oriented growth, has rich shale stratified structures, is different from the existing potassium magnesium titanate, and is a novel potassium magnesium titanate structure; the potassium magnesium titanate is added into a brake pad to serve as a friction control agent body; the brake pad shows ultra-low wear rate, has extremely low wear rate on a brake disc, and can effectively protect a dual disc; a friction coefficient of the brake pad embodies excellent stability under different working conditions, and the fading rate under a particularly high temperature condition is less than 10 percent.