Legal analysis: Generally speaking, it will not, and the debts of grandpa and grandson will not affect each other.

legal basis: article 18 of the civil code of the people's Republic of China shall pay off debts. If it is temporarily unable to repay, it may be repaid by the debtor in installments with the consent of the creditor or the ruling of the people's court. Those who have the ability to repay and refuse to repay shall be forced to repay by the people's court.