The invention relates to a method for using a flow rate regulating device for 
nursing. The liquid flow rate regulating device is used to regulate the flow rate. The liquid flow rate regulating device includes an infusion tube and a side regulating device; the regulating method includes the following steps: Step 1, assembling  : Step 1.1, assembling the speed regulating 
plunger; Step 1.2, placing the adjusting bolt, adjusting 
washer, and compression spring; Step 1.3, assembling the upper limit piece; Step 2. Infusion; Step 3. Adjusting the flow rate; Step 4.  Give the 
drug quickly.  The liquid flow rate regulating device used in the present invention has a reasonable structure, is convenient for 
mass production, and is convenient and simple to assemble; the method of the present invention can adjust the 
rate of infusion under 
normal conditions; the method can also be used in 
emergency situations.  Adjusting the pressing damping of the speed-regulating 
plunger can further close the rapid 
drug delivery function; this method can further prevent long-term rapid 
drug delivery by delaying the alarm, causing 
drug overdose.