A grain drying machine with dust collection device comprises a housing, a hot air dust collection unit, and a main dust collection unit. The housing defines a hollow receiving chamber and comprises a partition for dividing the hollow receiving chamber into a drying space and a grain collecting space. The partition is provided with a plurality of openings allowing grains to fall into the grain collecting space from the drying space. The hot air dust collection unit comprises a hot air blower disposed at one side of the housing, an exhaust fan disposed at the other side of the housing, and an air channel set. The air channel set is communicated with the hot air blower, the exhaust fan, and the drying space. The main dust collection unit comprises a dust connection pipe communicated with the grain collecting space and the exhaust fan. By the extraction and suction force of the exhaust fan, the grain dust in the hollow receiving chamber may be discharged from the exhaust fan through the air channel set and the dust collection pipe.一種具有集塵裝置的穀物乾燥機,包含一機殼、一熱風集塵單元,及一主集塵單元。該機殼界定出一中空容室,並包括一將該中空容室分隔出一乾燥空間及一集穀空間的隔板。該隔板具有複數供穀物由該乾燥空間落入該集穀空間之開口。該熱風集塵單元包括一設置於該機殼之一側的熱風機、一設置於該機殼之另一側的抽風機,及一風道組。該風道組連通該熱風機、該抽風機與該乾燥空間。該主集塵單元包括一連通該集穀空間與該抽風機之集塵管。透過該抽風機之抽引吸力,能使位於該中空容室之穀塵經由該風道組及該集塵管自該抽風機排出。1‧‧‧機殼11‧‧‧中空容室111‧‧‧乾燥空間112‧‧‧集穀空間12‧‧‧隔板3‧‧‧熱風集塵單元31‧‧‧熱風機32‧‧‧抽風機33‧‧‧風道組331‧‧‧熱風道332‧‧‧抽風道4‧‧‧主集塵單元41‧‧‧集塵管42‧‧‧集塵入口
