Legal analysis: it should bear part of the guarantee responsibility. The guarantee contract is a subsidiary contract of the main contract. The main contract is invalid, and the guarantee contract is invalid. If there are other provisions in the guarantee contract, such provisions shall prevail; If the main contract is invalid and the guarantee contract is invalid, and the guarantor is at fault, the part that the guarantor bears civil liability shall not exceed one third of the part that the debtor cannot pay off.

Legal basis: Article 388 of the Civil Code of People's Republic of China (PRC) establishes a security interest, and a security contract shall be concluded in accordance with this law and other laws. Guarantee contracts include mortgage contracts, pledge contracts and other contracts with guarantee functions. The guarantee contract is a subsidiary contract of the main creditor's rights and debts contract. If the principal creditor's rights and debts contract is invalid, the guarantee contract is invalid, unless otherwise stipulated by law.