The invention discloses a non-metal crown-shaped retaining appliance for a high-speed bearing. The non-metal crown-shaped retaining appliance comprises a retaining appliance body. A plurality of external diameter dip angle structures are arranged on the peripheral surface of the retaining appliance body, and the multiple external diameter dip angle structures are distributed at the outer edge position of the peripheral surface of the retaining appliance body and are arranged at equal intervals. A retaining appliance bag hole is formed in the retaining appliance body, a steel ball is arranged in the retaining appliance bag hole, a retaining appliance fore shaft is arranged on the top of the retaining appliance bag hole, the retaining appliance fore shaft is provided with a plurality of fore shaft dip angle structures, and two fore shaft dip angle structures with the same shape and size are arranged between every two adjacent external diameter dip angle structures. According to the non-metal crown-shaped retaining appliance, the precision of the retaining appliance fore shaft is increased, the strength of the fore shaft is improved, meanwhile, the additionally-arranged fore shaft dip angle structures can increase the distance between the retaining appliance body and the retaining appliance bag hole, and the structural strength of the retaining appliance fore shaft is enhanced; and the external diameter dip angle structures reduce the probability of contact between the retaining appliance body and an outer ferrule of the bearing.