The invention discloses an automatic transfusion monitoring warning system. Medicine personnel can monitor the transfusion states of a plurality of patients in a remote way in a nurse station, and in addition, the warning is given on a display screen during the patient transfusion completion. The transfusion monitoring warning system has the advantages that the warning effect is good, an electronic detection device does not need to be soaked into medicine liquid and is directly clamped onto a transfusion tube, the use is convenient, the design is ingenious, the implementation is easy, the technological content is high, an antitheft function is realized, the labor cost of medical personnel is saved, the unnecessary patient blood return, blood coagulation and tube blockage can be avoided, the circuit installation is not needed by the system, the system is directly used and independently operates, and the touch with other medical facilities is not needed. The system can also be used as a component to be integrated onto the existing circuit of the hospital, and the transfusion monitoring warning system is applicable to medical electronic product industry.