Su was born in the town of Longshan [zh], Cangxi County, Sichuan, on 5 November 1918.

[1] After the founding of the Communist State in 1949, he was appointed director of Anhui Public Security Department.

He was vice governor of Anhui in May 1956 before being assigned to the similar position in the neighboring Shandong province in 1960.

[1] In 1966, Mao Zedong launched the Cultural Revolution, he suffered political persecution.

[1] On 7 June 2021, Su Yiran died in Jinan, Shandong, aged 102.