The invention discloses white alum breaking and scattering integrated equipment for domestic wastewater treatment. The equipment structurally comprises a breaking device, an electric control box, a ventilation hole, a feeding opening, and a lifting ring; the breaking device is composed of a box body, an arc guide plate, a dustproof cylinder, a scattering device, a breaking mechanism, and a dustproof backflow mechanism, through the electric control box, the breaking mechanism is controlled to operate, a rotating motor drives a grinding device to break white alum through a rotating shaft, a hopper is matched with a movable plug to more effectively break and uniformly scatter white alum, through the conical rotating body, the blades are driven to rotate to generate negative pressure, the white alum can be effectively guided out, dust can be prevented from flowing back and entering the equipment, through the dustproof backflow mechanism, dust backflow can be prevented, splashing of the white alum during breaking can be prevented, the structural design is simple and reasonable, and the equipment is suitable for production use.