Legal analysis: Parents need their children to sign a loan because their parents are older and lack of qualifications, so they need their children to sign a guarantee and sign a guarantee contract, so that they can agree to their parents' loan application. However, it depends on the situation that parents need their children to sign the loan. If the parents' own qualifications meet the loan conditions, then there is no need for children to guarantee or sign.

However, if parents borrow money and their children sign it, it doesn't mean they have to bear the responsibility. Only after signing the guarantee contract, they need to bear the responsibility. After signing the guarantee contract, if the parents are unable to repay the loan, they need their children to help them repay.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 667 A loan contract is a contract in which the borrower borrows money from the lender, repays the loan at maturity and pays interest.

Article 680 usury is prohibited and the loan interest rate shall not violate the relevant provisions of the state. If there is no agreement on the payment of interest in the loan contract, it shall be deemed that there is no interest. If the loan contract does not specify the payment method of interest, and the parties cannot reach a supplementary agreement, the interest shall be determined according to the local or the parties' trading methods, trading habits, market interest rates and other factors; Loans between natural persons are regarded as interest-free.