The invention provides a crushing device of a finished product fluorescent material, and relates to a crushing device, in particular to the crushing device of the finished product fluorescent material. The invention provides the crushing device of the finished product fluorescent material with the advantages that residues in a reaction kettle are few; the materials are saved; the granularity is uniform. The crushing device comprises a reaction kettle with an opening at the upper part and a sealing cover covered and buckled on the reaction kettle, wherein a plurality of zirconium beads are arranged in the reaction kettle; a stirring device is arranged in the reaction kettle; the stirring device is arranged on a stirring shaft and is driven by a motor; the stirring shaft is a hollow shaft; one end of the hollow shaft is connected with high-pressure air; the other end of the stirring shaft is provided with a plug; a plurality of ventilation holes are formed in the stirring shaft. Fluorescent powder remained on the side wall of the reaction kettle and the zirconium beads is effectively cleaned; the powder can be taken out of the reaction kettle; the deposition of the powder in the reaction kettle is avoided; the effect of lowering the powder pollution on environment can also be achieved.