1935年华北事变后,随着日本帝国主义对华侵略的步步深入,国民党政府的对日政策发生了某种变化,即由妥协退让逐渐转向强硬,其发生变化的原因可从民族矛盾的激化、经济利益的冲突.地方实力派政治态度的变化、英美对日态度的转变以及强大的政治压力等五个方面作出分析. After the incident in North China in 1935, with the deepening of the Japanese aggression against China by the imperialists, the Kuomintang government’s policy on Japan had undergone some changes, that is, from compromise and concession to gradually turning to toughness. The reasons for its change can be attributed to the intensification of ethnic conflicts , The conflict of economic interests, the change of political attitude of local power, the change of Anglo-American attitude towards Japan and the strong political pressure.