A syringe with an injection dose adjustment function, comprising a vial connecting device and an adjustable propulsion device, wherein a vial is connected by a vial connecting device, and then an adjustable propulsion device is installed in the vial connecting device and Extending into the vial, the button of the vial connecting device can drive the push rod of the adjustable propulsion device to move backward to a predetermined scale. When the injection is pressed, the push bottle can output a predetermined dose of the liquid medicine, so that the medicine bottle can output a predetermined dose of the liquid medicine. The syringe of the present invention is capable of adjusting the injected dose depending on the needs of different injection subjects.一種具有注射劑量調整功能的注射器，其包括一藥瓶連接裝置與一可調式推進裝置，其中藉由藥瓶連接裝置組接藥瓶，再以可調式推進裝置裝設於藥瓶連接裝置中及伸入藥瓶內，藥瓶連接裝置的轉鈕能驅動可調式推進裝置的推桿朝後移動至預定的刻度，於注射時，按壓推桿即能使藥瓶輸出預定劑量的藥液，使本發明注射器能夠依據不同注射對象的需求而調整注射劑量。
