The invention relates to granule processing machinery, namely, a movable drag type field straw moulding granulator which is characterized by comprising a tractor, a straw harvester, a pulverizer and a granulator, wherein the tractor front drags the straw harvester behind; the straw harvester is connected with the pulverizer; the back of the pulverizer is connected with the granulator. The movable drag type field straw moulding granulator has the following beneficial effects: movable operation can be realized to finish the harvesting, pulverizing and granulating operations on the straw at a time; by adopting a novel feeding device and a granule output device, extrusion between a frustum and a through hole is accurate and sufficient, biomass powder easily passes through and is moulded compactly; the movable drag type field straw moulding granulator has the advantages of high production efficiency, low energy consumption, low cost, stable operation and long service life, and can be applied to the granule moulding of feed, coal powder and fertilizer, and has a considerable market prospect.