In recent years, grain prices inversion phenomenon occurred in domestic grain market, which is also the major challenges to the sustainability of grain purchase policy currently. Although current grain price inversion policy causes the similarity to grain price inversion at the stage of planned purchase and supply and double-track system, the absolute inversion is changed to relative inversion, the corresponding environment is also basically changed. Facing the current grain price inversion, China should not conduct downstream control like planning economy time and can not popularize objective price in a short time, furthermore, international grain price is low and is restricted by WTO rules, therefore, recent grain price inversion is possible to become a kind of normalcy. The solution to grain price inversion problem needs to actively boost market-oriented reform of overall industry-chain and to combine short time suitability (transformation and upgrading of grain processing industry) with long-term reform (reform of grain circulation system) under marketability goal.