The utility model relates to a disposable dropping barrel which combines a dropping bottle, a guide tube, and a needle head into integration. A filter is arranged inside a bottle opening on the top of the dropping bottle, and the outer part is sheathed with a dropping bottle cap. A dropping barrel sleeve is arranged outside the dropping bottle. A filter screen is arranged inside a Murphy's tube. A glass dropping barrel, the guide tube, the dropping bottle, and the needle head which are used at present are separate type. The guide tube is a rubber tube, a glass funnel is matched and used outside, and needs to be disinfected by a cloth bag each time. The guide tube has the defects of fragileness, poor transparency, multiple infusion reactions, inconvenient use, etc. When the disposable dropping barrel is utilized for the uses of blood transfusion and infusion for operation patients, other auxiliary devices and temporary disinfection are not needed. The disposable dropping barrel has the characteristics of fewer infusion reactions and convenient use.