The invention relates to the field of medical instruments, in particular to a vein continuous infusion intelligent controller and an application method thereof. The technical scheme is as follows: a single machine can realize uninterrupted continuous infusion of multiple bags; according to different types of drug in each bag, the dropping speed and drug amount can be regulated; the intelligent controller can automatically rinse an infusion tube, automatically gives an alarm and closes for abnormal infusion, automatically closes after infusion is finished and notifies a central display monitor system to process. The invention changes the current situation of gravity infusion, artificial care, manual bag change and manual dropping speed control, greatly lightens the labor intensity and psychological nervousness of hospitals and patient family members, causes infusion treatment to become relaxed, safe, ordered, precise and controllable and can greatly save manpower, so that nurses have time to observe the treatment situation of patients. In addition, the invention can improve clinic drug administration efficiency, lowers treatment risk, improves vein drug administration treatment level, and improves hospital treatment level and nursing images; and furthermore, the invention has low manufacture cost and strong practicality and is favorable for popularizing and applying.