The lags of the policy of curriculum reform have become one of the main obstacles for deepening the reform. The policies of curriculum reform supply lags especially serious in both mandatory policy and guiding policy,which are manifested by supervision policy lagging,incentive policy lagging,punishment policy lagging,training lagging,teaching support lagging and supporting lagging. The influence factors of policy lagging are extensive and all around,in which decision-making mode,professional research and interest game are the three underlying causes.