Intravenous drip monitor

The utility model relates to an intravenous drip monitor. The intravenous drip monitor comprises a sound wave receiving box (4); a vibrating membrane (4) of the sound wave receiving box closely adheres to the external of an acoustic sensitive resistor (5) is arranged inside the sound wave receiving box; the acoustic sensitive resistor is connected with a low-frequency power amplifier chip (9) which is connected with an acoustic control chip (10); the acoustic control chip is connected with a power failure time-delay relay (6); an internal switch K1 (12) is connected with the power failure time-delay relay; and the internal switch K1 is connected with a buzzer (7) and a bedside annunciator. The intravenous drip transfusion is a common method for treating and nursing in hospitals. Detection methods of the intravenous drip transfusion includes that the flow rate is set in advance through nursing personnel, time needed for patient transfusion is estimated, and then continuous perambulation is supplemented; and a