1. People who have been in prison can buy a car by mortgage. As long as the lender meets the conditions stipulated by law, mortgage loans can be made. Imprisonment means that the punishment has ended and does not affect the normal borrowing of the perpetrator. But if it is an economic crime, imprisonment may affect the bank's trust in the lender.

2. Legal basis: Article 11 of the Interim Measures for the Administration of Personal Loans.

Personal loan application shall meet the following conditions:

(1) The borrower is a People's Republic of China (PRC) citizen with full capacity for civil conduct or an overseas natural person who meets the relevant provisions of the state;

(2) The purpose of the loan is clear and legal;

(3) The amount, duration and currency of the loan application are reasonable;

(4) The borrower has the willingness and ability to repay;

(5) The borrower's credit status is good and there is no significant bad credit record;

(6) Other conditions required by the lender.

2. Is it necessary to guarantee the second-hand car mortgage?

Whether the mortgaged second-hand car needs guarantee is decided by the lender, and the lender decides that it must be guaranteed. The loan contract shall be in written form. The contents of a loan contract generally include terms such as loan type, currency, purpose, amount, interest rate, term and repayment method. When concluding a loan contract, the borrower shall provide true information on the business activities and financial status related to the loan as required by the lender.