Portable local circulation fumigation device

The utility model discloses a portable local circulation fumigation device comprising a pressure vessel containing fumigant, a gas distributor, at least one blower, a relevant number of gas inlet pipes, and more than three gas ingress pipes, wherein, a group of interfaces are formed on the gas distributor, the pressure vessel, the gas outlet of the blower and the gas ingress pipes are connected respectively with the interfaces on the gas distributor through hoses, the gas inlet of the blower is directly connected with the gas inlet pipes, the gas ingress pipes and the gas inlet pipes are hard pipes, small holes are formed at the peripheries of the lower parts of the gas ingress pipes and the gas inlet pipes, and the small hole is so small in size that grain particles can be prevented from leakage. The fumigation device is simple in structure and small in size. Moreover, the fumigation device can be assembled on site, and can be used moveably in different parts of a barn or in different barns.