The “July 7th Incident” broke out, and the whole nation’s War of Resistance Against Japanese Aggression began. Liu Zhenhuan, who had been dormant for more than ten years due to the “Yang and Liu Rebellion” in 1925, devoted himself to the anti-Japanese movement based on the crisis of national survival and patriotic sentiments, and was influenced by the Anti-Japanese National United Front of the Communist Party of China. During this period, Liu Zhenhuan, on the one hand, through speeches, radio broadcasts, and published articles, promoted China’s victory in the War of Resistance Against Japanese Aggression, friendship and cooperation with the Soviet Union, and the establishment of a joint front against aggression among China, the Soviet Union, Britain and the United States, to strengthen the people’s confidence in the war; on the other hand, using his position as a consultant to the Yunnan Provincial Government, president of the Kunming Branch of the China-Soviet Cultural Association, and chairman of the board of directors of Yuexiu Middle School, he cultivated and strengthened revolutionary forces, promoted friendly cooperation between China and the Soviet Union, and united overseas Chinese to participate in the motherland’s anti-Japanese war. Liu Zhenhuan’s persisting in the War of Resistance Against Japanese Aggression until victory, the confidence to win the War of Resistance and the practice of devoting himself to the War of Resistance are worthy of affirmation and praise. On the whole, Liu Zhenhuan’s anti-Japanese propositions and activities are in line with the trend of the times and are progressive. However, due to personal cognition and the current situation, it has certain limitations. Liu Zhenhuan’s practice during the War of Resistance Against Japanese Aggression showed that when the Chinese nation faced peril, many old warlords put aside their past personal and group grievances and adhered to national justice and integrity. This is an important gene for the continued survival of the Chinese nation.