He had served formerly as a member of the armed forces of India as a Havildar (equivalent to a sergeant), where he was rendered overseas in the Burma Campaign during World War II.

His brother Chaudhary Sardar Khan served as a Member of Legislative Assembly from the Nuh constituency and worked as the Minister of State for Home Affairs in the Government of Haryana (1977–1982).

Following this, in 1967, he contested and won the first-ever Legislative Assembly Seat from the Nuh constituency, following the creation of Haryana State from Punjab in 1966.

[citation needed] Chaudhary Rahim Khan is also said to have a close friendship and political relationship with the Former Prime Minister of India, Rajiv Gandhi.

Khan had welcomed the former Prime Minister of India, Rajiv Gandhi, to the Saumka village of Kaman, Rajasthan.

[7] On 15 February 2021, The Government of India passed the budget for the Gurgaon-Nuh-Alwar railway lines as proposed by Chaudhary Rahim Khan.

[9] He made demands for the recognition of the ethnic Meos as part of the Scheduled Tribes in India and granting them reservations accordingly due to their economically and educationally disadvantaged status in Indian society.

"Na Samjhoge A- Hindostan Walo to mit jaoge, Tumhari Dastan Tak Bhi Nahin Hogi Dastanon Main.

Khan also addressed rural development, noting the lack of basic amenities such as electricity, water supply, and sewerage in villages compared to urban areas.

Furthermore, Khan spoke about the issue of corruption, suggesting that loans and permits should be made more accessible to ordinary citizens, particularly unemployed youth.

[10] When Chaudhary Rahim Khan was elected for his second term in Haryana's Legislative Assembly in 1972, he defeated Khurshid Ahmed, who was a sitting minister at that time.

Following this humiliating defeat, Khurshid Ahmed filed a case in the Punjab and Haryana High Court against Chaudhary Rahim Khan and challenged the election on various grounds of corrupt practices.

Chaudhary Rahim Khan was accused of the following under the Representation of the People Act, 1951: The distribution of damaging handbills was crucial evidence in the case.

The court found acceptable, direct, and circumstantial testimony that the handbills were distributed with the knowledge and consent of Chaudhary Rahim Khan, which led to the finding of corrupt practices.

Hence, Chaudhary Rahim Khan was booked under sections 123(3) and (4) of the Representation of the People Act, 1951 for appealing to voters' religion and character assassination of Khurshid Ahmed.