The front battlefield, the behind-enemy battlefield and the rear battlefield constitute a panorama of the battlefield in anti-Japanese war. Despite their separate development and characteristics, the three battlefields are complicatedly interrelated and interdependent. On the three battlefields, the Kuomintang and the Communist Party united and fought, collaborated and competed, displaying their own courage and action when faced with the serious issue of national interest and commitment, which reflects the tough process of the united national anti-Japanese front advocated and led by the Communist Party of China. Both the objective and subjective reasons could explain why the rear battlefield should be regarded as a battlefield of particular form. The main reason is that such a view mirrored the "consciousness of national war" to fight for every inch of precious Chinese territory. The historical and dialectic analysis of the characteristics and functions of the battlefields, according to the "three-battlefield" theory introduced by this essay, has proved that the united national anti-Japanese front, based on the cooperation between the Kuomintang and the Communist Party, and advocated and led by the Communist Party of China, constitutes the main form for the national anti-Japanese revolution. From the perspective of the national ultimate fate, the Communist Party and the Kuomintang are the two leading forces in the national common fate union. The victory on the three battlefields, which contributed a lot to the east battlefield in the international anti-fascism war, resulted from the massive power of Chinese people and the national consciousness.