Abstract: The active role played by CPC Delegation to the Communist International in the buildinng of Anti Japanese national united front leads to the following achievements:initially raising the slogan and guiding principle to establish the Anti Japanese national united front ,actively developing the work of the national united front in Northeast China,putting forward for the first time the integral tactics for the Anti Japanese national united front,and raising in time the slogan of uniting and urging CHIANG Kai...