Coffee grinding device and coffee machine

The embodiment of the utility model relates to the technical field of coffee, in particular to a coffee grinding device and a coffee maker, the coffee grinding device comprises a driving mechanism, a rotary grinder, a sensor and a main board, the rotary grinder is connected with the driving mechanism, and the driving mechanism is used for driving the rotary grinder to rotate; the sensor comprises a magnetic part and a Hall sensing unit, the magnetic part is connected with the driving mechanism and used for rotating along with an output shaft of the driving mechanism, and the Hall sensing unit is used for sensing a magnetic field of the magnetic part to generate a pulse signal; the mainboard is electrically connected with the Hall sensing unit, the Hall sensing unit transmits a measured pulse signal to the mainboard, and the mainboard is used for calculating the number of revolutions output by the driving mechanism according to the pulse signal and controlling the driving mechanism to stop working when the num