考察历史可以发现，华北事变以前，中间势力积极要求抗日、民主和团结。为造成举国一致的抗日局面，中间势力吁请国民党各实力派停止内战，积极反对国民党的“剿共”战争，并提出了结束“国共内战”的条件。由于复杂的历史原因，中间势力所倡导的统一战线的主张难以实现，但不能因此而抹煞它作为抗日民族统一战线最早倡导者的历史事实。 Examining history, we can see that before the North China Incident, the middle forces actively demanded resistance, democracy and unity. To create a unified nationwide anti-Japanese situation, the central forces urged Kuomintang forces to stop the civil war and actively oppose the Kuomintang’s “suppression of the communist” war and put forward the conditions for ending the “civil war”. Due to complicated historical reasons, the claim of the united front advocated by the middle forces is hard to come by but it can not therefore deny its historical facts as the earliest advocate of the anti-Japanese national united front.