A combined type portable incense-fumigating device comprises a lower box seat and an upper box body; the lower box seat and the upper box body are each provided with a ventilation channel; the lower box seat is provided with a large incense-fumigating material storage box along the ventilation channel; the upper box body is provided with a small incense-fumigating material storage box and an air supply wind wheel along the ventilation channel; the upper box body is movably buckled on the lower box seat; the ventilation channels of the lower box seat and the upper box body communicate with each other from bottom to top. The combined type portable incense-fumigating device has the technical effects of long service life, small opening/closing moment of force, small coefficient of flow resistance, good energy-saving effects, and simple manufacturing, installation and maintenance.