Magnetic coagulating sedimentation sewage treatment equipment and sewage treatment method

The invention relates to the technical field of sewage treatment equipment, in particular to magnetic coagulating sedimentation sewage treatment equipment and a sewage treatment method. The method includes: adding magnesium carbonate into sewage for coagulation treatment, then sending the product into a magnetic coagulating reaction tank, adding magnetic powder comprising 8.2-8.8wt% of si, 9.5-9.7wt% of Mg and the balance Fe into the magnetic coagulating reaction tank for magnetic coagulating reaction, then sending the product into a flocculation reaction tank at the end of the reaction, adding a flocculant comprising 12-15wt% of bleaching powder and the balance slaked lime into the flocculation reaction tank for reaction, then sending the product into a precipitation tank for precipitation, discharging the supernatant from a water outlet, discharging sludge from a sludge outlet, sending the sludge into a shearing device for shearing treatment, then recovering magnetic powder by a magnetic drum, and finally i