Ampoule bottle dotting device

The utility model relates to an ampoule bottle dotting device which is characterized by comprising a conveying frame, a conveying chain, a dotting glue barrel, a lifting air cylinder, a supporting rotary seat and a floating pressing plate. A floating pressing plate matched with a supporting rotating wheel at the top end of a lifting air cylinder is arranged above an ampoule bottle, the floating pressing plate is driven by an electromagnet to tightly press a bottle body of the ampoule bottle in the vertical direction, and when the lifting air cylinder drives the supporting rotating wheel to ascend, the electromagnet loses power; the supporting rotary rolling wheel and the floating pressing plate clamp the ampoule bottle together to ascend and make contact with a sizing material conveying hose of a dotting sizing material barrel for dotting, after dotting is completed, the lifting air cylinder descends to enable the ampoule bottle to be separated from the floating pressing plate, and the ampoule bottle is place