The utility model relates to a tubular liquid dilutes blender, including the tubulose body, the tubulose body includes medicament input section (1) that is used for inputing solvent and solution, and is located mixing section (2) in medicament input section (1) low reaches, mixing section (2) interior interval sets up a plurality of edges axially extended plate (21) in order to be formed with many fluid passage. Through with the axially extended plate setting in a plurality of edges at this internal formation mixing section of tubulose for the medicament is divided into many fluid passage at the in -process that flows, thereby realizes medicament solution and can realize automatically mixing diluting when the pipe flow.