The invention belongs to the technical field of agricultural machinery, and relates to a poppy harvester, in particular to a small roller type poppy harvester. The poppy harvester comprises a harvesting bin, a header, a conveying device, a header transmission device and a crawler chassis. The header comprises a reciprocating type cutter at the front end of a bottom plate, a plurality of harvestingsingle bodies side by side, and a header driving shaft. Each harvesting single body comprises two parts in left-right symmetry. The left and right parts of each harvesting single body each comprise adivider, a guider, a conveying roller and a cylindrical cutter. The conveying rollers of the left and right parts of each harvesting single body rotate oppositely. The conveying device comprises a belt conveyer. The header transmission device drives a reciprocating cutting driving shaft and the header driving shaft to rotate. The small roller type poppy harvester can adapt to the growth characteristics of poppy, meets the poppy harvesting requirement, saves labor and materials and improves the labor production efficiency.