The invention provides a bearing adjustment assembly, which comprises a worm engaged with a worm gear. The invention also provides a power steering assembly, which comprises a shell. The assembly alsocomprises a worm gear arranged in the shell. The worm gear can rotate around a first axis. The assembly also includes a worm, which is at least partially arranged in the shell, is set to be jointed with the worm gear, and rotates around a second axis. The assembly further comprises a first worm bearing arranged next to the first end of the worm and a second worm bearing arranged next to the second end of the worm. The assembly further includes a compensation mechanism, which is arranged in the shell and is jointed with the first worm bearing, the compensation mechanism being adjustable to bias the first worm bearing to maintain or adjust a gear mesh load between the worm gear and the worm.