The invention relates to the field of air purification of workshops, and especially relates to a water filtering and dust absorbing device for flour mills. The water filtering and dust absorbing device comprises a shell, a blower fan, a controller, and a filter box. The device has the advantages that dusts can be effectively removed; air leakage will not happen, the dedusting efficiency is high; the electrostatic problem in the prior art is avoided, the happening rate of dust explosion is reduced; the occupied space is small, and the device is easy to install and maintain.