The invention discloses an air sterilizing device for a hospital ward. The air sterilizing device comprises a shell, bases, a first partition, a second partition, ventilation holes, a guide-in cavity,a sterilizing cavity, a guide-out cavity, a first motor, fan blades, a mounting shell, an air pump, an air guide pipe, an air pumping pipe, an air pumping bin, fixing rods, branch pipes, a second motor, a rotary disc, activated carbon rods, a lamp holder, an ultraviolet sterilizing lamp, a liquid pump, liquid guide pipes, sterilizing pipes, atomization nozzles, a disinfectant tank, a primary filter screen and a secondary filter screen. The air sterilizing device has the advantages that the defects that the prior art is low in air sterilizing efficiency, poor in effect, single in manner and small in range are overcome; the air sterilizing device is simple in structure, small and exquisite in size, good in sterilizing effect, diversified in sterilizing manner, high in efficiency, wide in range and the like.