Abstract: By the twin-rollers flaker designed by the researchers, flaking on high-moisture(28.9%) corn harvested in Heilongjiang Province by hot-air heating was investigated, which was helpful to solve the cost problem of steam-flaking. For study of relevant factors which influence the wet-heating processing,the experimental method of the quadratics rotary orthogonal combination was adopted,and three evaluation indexes(gelatinization,unit weight and material powder) were applied in the experiment.The wet-heating approach is useful to improve corn gelatinization by experimental results.By the experimental equipment and parameters, a set of optimal parameters were obtained by the experiment: hot-air temperature 130℃，heating duration 60～70min，rolling clearance 0.5～1.0mm，rolling rotation speed 150～200 r/min。