He was elected to the Provincial Assembly of the Punjab from Constituency PP-226 (Sahiwal-VII) as a candidate of the National Alliance in the 2002 Pakistani general election. He received 33,693 votes and defeated Mian Asad Masood, a candidate of Pakistan Peoples Party (PPP).[2]
He was elected to the National Assembly of Pakistan from Constituency NA-163 (Sahiwal-IV) as a candidate of the Pakistan Muslim League (Q) (PML-Q) in the 2008 Pakistani general election.[3][4][5] He received 39,864 votes and defeated Begum Shahnaz Javed, a candidate of PPP.[6]
He ran for the seat of the National Assembly from Constituency NA-163 (Sahiwal-IV) as a candidate of PML (Q) in the 2013 Pakistani general election but was unsuccessful.[7] He received 67,076 votes and lost the seat to Muhammad Munir Azhar.[8]
He was re-elected to the Provincial Assembly of the Punjab as a candidate of the Pakistan Tehreek-e-Insaf (PTI) from PP-202 Sahiwal-VII in the 2018 Pakistani general election.[9]
On 27 August 2018, he was inducted into the provincial Punjab cabinet of Chief Minister Sardar Usman Buzdar without any ministerial portfolio.[10] On 29 August 2018, he was appointed as Provincial Minister of Punjab for Agriculture.[11]
In March 2021 Langrial became a part of a dissenting group from the PTI called the Jahangir Tareen group. The Jahangir Tareen group was made after Tareen, a close friend of Imran Khan and core member of the PTI, was investigated for corruption during his own government.[12] In April 2, 2022 Langrial joined forward block against his own party Pakistan Tehreek-e-Insaf and supported opposition's candidate Hamza Shahbaz.[13][14] Chaudhry Pervaiz Elahi, the Speaker, sent a reference against the dissenting MPAs, including Langrial, for defecting from their party's policy.[15]
He was de-seated due to this vote against party policy on 16 April 2022.[16] He ran in the resulting by-election for PP-202 Sahiwal-VII as a candidate of the Pakistan Muslim League (N) (PML(N)), but was unsuccessful. He received 59,191 votes and was defeated by Muhammad Ghulam Sarwar, a candidate of the PTI.
On 13 September 2022, he was inducted into Shehbaz Sharif Cabinet as SAPM.[17]
On 8 June 2023, Langrial joined Istehkam-e-Pakistan, a new political party.[18]
