The invention provides a manufacturing process of a hub bearing and solves the technical problems that an existing production process is too simple to ensure the quality of the bearing and the product quality is poor. According to the manufacturing process of the hub bearing provided by the invention, the hub bearing comprises an outer ring, an inner ring, a holder and a steel ball. The manufacturing process comprises the following steps of: a, manufacturing the outer ring; b, manufacturing the inner ring; c, manufacturing the steel ball; d, manufacturing the holder; e, assembling the bearing; f, cleaning the bearing; g, spraying the bearing; and h, detecting the bearing. The hub bearing provided by the invention has the advantage of high product quality.