合同的约定解除制度通过预先设定合同解除权条件以督促合同双方当事人正确履行合同。合同解除权的行使需要遵守诚实信用原则。本文据一买卖合同解除纠纷,分析司法实践中对约定解除权的行使加以适当限制的理由。 Contract lifted the system by pre-setting terms of the contract lifted to urge the parties to the contract the correct performance of the contract. The exercise of the right to rescind the contract needs to comply with the principle of good faith. This article, according to a contract of sale, lightens up the dispute and analyzes the reasons why the exercise of the right of termination should be restricted appropriately in judicial practice.