Safety-protection infusion apparatus

The invention provides a safety-protection infusion apparatus. The safety-protection infusion apparatus is characterized in that an air sterilizer is arranged on an air tube and can sterilize bacteria and viruses in outside air; a diaphragm net capable of forming a water surface tension is arranged in a dropper, and can automatically stop flowing of a medicine liquid after infusion is completed so as to avoid situations that air enters the vein and the blood returns; a dripping speed warning device is arranged outside the dropper, can automatically calculate the dripping speed, and can give an alarm when the dripping speed exceeds a preset upper limit and a preset lower limit; a dripping speed regulator has a locking function to avoid the potential safety hazard caused by dripping speed regulation without permission; a needle accommodating sleeve is arranged on a thin infusion tube, and can accommodate a puncture needle, which is pulled out after the infusion is completed, in the sleeve so as to effectively prevent accidental puncture from occurring; a needle handle and a puncture needle fixer are arranged on the puncture needle, the needle handle is perpendicularto the puncture needle, and the puncture needle fixer is matched with the needle handle, so that a situation of puncture needle removal or medicine liquid extravasation can be prevented from occurring.