During his stay in Japan he approved the ideology of revolution, in 1906 he became a member of the Tongmenghui and subsequently he participated in the “Party of Blood-and-Iron Warriors” (鐵血丈夫團).

But in 1910 Qing authorities suspected he was a secret supporter of the anti-Qing revolutionary movement, so he resigned his post and went back to Sichuan.

In 1911 he became the Vice-President of the Training Office for New Army (新軍教練處會辦) and the acting President of the Military Elementary School (陸軍小學總辦代理).

Yin commanded his army and quelled the insurgent troops quickly, so he succeeded Pu's position by the backing of public opinion.

On 22 April same year Yin was appointed the Commander-in-Chief of the Military for the Subjugation of Tibet (征藏總司令) by Yuan Shikai.

[3][8] After returning to Chengdu, Yin Changheng came into collision with his powerful subordinate Hu Jingyi (胡景伊), the commander of an army corps of All Sichuang (全川陸軍軍團長).

Hu aspired to replace Yin as Military Governor of Sichuan and approached Yuan Shikai.

In 1920 Yin became the subordinate of Sun Yat-sen, but in next year he seceded from every political circle and lived in retirement in Chengdu.

[3][11] Writing in 1927, Louis Magrath King, a former British Consul in Sichuan, described Yin Changheng, whom King considered a friend, as a 'philosopher' who "expounded a sort of theosophy all his own, synthesizing the leading religions, Confucianism and Taoism and Islam and Buddhism and the two main divisions of Christianity.