Uddin was elected to Parliament in 1986, 1996, 2008, and 2014 from Mymensingh-6 as a Bangladesh Awami League candidate. On 31 December 2016, a murder case was filed against him over the death of two protesters, including a professor, in police action. The protestors were demanding the nationalization of the Fulbaria Degree College. On 24 January 2017, a former member of Mukti Bahini filed a case against Udin accusing him of carrying out war crimes during the Bangladesh Liberation war.