The invention discloses a bearing discharging assembly of a lawn mower head part assembling machine. The bearing discharging assembly of the lawn mower head part assembling machine comprises a bearing discharging rack; the bearing discharging rack is provided with a bearing discharging mounting plate; a bearing displacement mounting plate is mounted above the bearing discharging mounting plate on the bearing discharging rack; the upper end surface of the bearing displacement mounting plate is provided with a bearing displacement ring; four uniformly-distributed V-shaped open sliding chutes are formed in the bearing displacement ring; the upper end surface of the bearing discharging mounting plate is fixedly provided with a bearing displacement rotating cylinder; a rotating table of the bearing displacement rotating cylinder is fixedly provided with a displacement guide sleeve with a top surface; four uniformly-distributed longitudinal bearing displacement sliding chutes are formed in the displacement guide sleeve; and a bearing displacement guide shaft is sleeved by the displacement guide sleeve. In such a way, the bearing discharging assembly is convenient to discharge, high in work efficiency and low in production cost.