The utility model discloses a gear-adjustable electric bean grinder which comprises a main
machine shell, a fixed motor fixedly arranged on the main
machine shell, a driving rod axially connected with an output shaft of the motor in a sliding mode, a first
grinding disc connected with the driving rod and a second
grinding disc arranged in the main
machine shell and matched with the first
grinding disc for grinding. The upper end of the main machine shell is rotationally connected with an adjusting knob, a bean
inlet channel allowing beans to pass through is formed between the inner wall of the main machine shell and the motor, an opening is formed in the main machine shell and communicated with the bean
inlet channel, a lifting rod is arranged in the main machine shell, and one end of the lifting rod is matched with the adjusting knob through a linkage
assembly. One end of the lifting rod is connected with the main machine shell, the other end of the lifting rod is connected with the driving rod, the adjusting knob drives the lifting rod to move up and down relative to the main machine shell through the linkage
assembly, when the lifting rod moves up and down, the gap between the first grinding disc and the second grinding disc changes, and the electric bean grinder is simple in structure, good in use stability and high in adjusting precision.