In drug and medical instrument production, agentia or solutions require quantitative filling, especially in filling of injection solutions, relevant relation exists between the characteristics of solutions and a filling device, the filling device directly affects the filling metering of solutions and polluted degree of solution, and material selection of the filling device is directly determined by characteristics (corrosivity, for example ) of solutions, especially in filling of oxygen inhalation and humidifying products during medical instrument production, the utility model provides a visualized liquid quantitative filling device which can substitute manual liquid filling, guarantees the filling precision and avoids pollution caused by filling. The visualized liquid quantitative filling device includes a visualized storage barrel, and the like, the visualized storage barrel is made of transparent glass, and scales are arranged on the outer wall or the inner wall, and actual filling quantity for each time can be read out by an operator from the scales during the operation, and the visualized liquid quantitative filling device is simple and easy to operate.