Acceleration due clauses have great controversy in legal practice, but there is a lack of rationalization and refinement in the academic circle. Due to the fact that Article 634, Paragraph One of the Civil Code has the characteristics of semi-mandatory provisions, the application of the term loss of interest clause violates this paragraph to constitute an invalid clause. Article 752 of the Civil Code is not mandatory. The debt termination-type acceleration due clause may be characterized as the agreed dismissal or the conditions attached to the contract, according to the true intention of the parties. In the event that the debt termination clause entering the format clause causes the provider to be excessively free from contractual restraint, its content shall be governed by Article 497 of the Civil Code. If the effect of expediting acceleration due clause affects the debtor’s loss of a specific right or an additional payment, the dominant or implicit liquidated damage shall be generated. Meanwhile, the judicial adjustment rules that are reduced to the discretion of the regulation shall apply.