An automatic intravenous drip shut-off device, which is suitable to be installed outside of an intravenous tube, comprising a blocking module, an infrared sensor module, an alarm module, and a control module. When the infrared sensor module senses the fluid remained in the intravenous tube is too low, the control module can control the blocking module to change into a blocking position that blocks and seals the intravenous tube, and prompt the alarm module to send out an alarm signal at the same time. Through the design that the automatic intravenous drip shut-off device of the present invention can instantly block and seal the intravenous tube and instantly send out the alarm signal upon sensing that the level of fluid in the intravenous tube is lower than a predetermined level, incidents such as reversing blood flow into the intravenous tube or a needle can be effectively prevented, and patients, family members, and medical staffs can be instantly reminded for precautions.一種點滴自動關閉裝置,適用於安裝在一條點滴管外,包含一阻斷模組、一紅外線感測模組、一警示模組與一控制模組。控制模組可於紅外線感測模組感測到該點滴管內殘存之點滴液過低時,控制該阻斷模組變化至阻斷封閉該點滴管之阻斷位置,並同時驅使該警示模組發出警示訊息。透過本發明點滴自動阻斷裝置可於偵測到點滴管內之點滴液液面已低於預定高度時,即時阻斷封閉該點滴管,並同時發出該警示訊息的設計,可有效防止血液逆流入點滴管或針頭的情況,並即時提醒患者、家屬與醫護人員注意。3‧‧‧機殼30‧‧‧嵌置槽31‧‧‧凸抵部4‧‧‧紅外線感測模組41‧‧‧紅外線發射器42‧‧‧紅外線感測器5‧‧‧阻斷模組51‧‧‧驅動機構511‧‧‧馬達512‧‧‧轉軸513‧‧‧轉盤514‧‧‧傳動桿52‧‧‧阻斷件900‧‧‧點滴管
