It is positive to apply this law to the precondition, the essential of application and the force effect about the right of counterplea against untrustworthiness. Concurrent Demur in Bilateral Contract 对新合同法中有关不安抗辩权问题进行初步分析,探索不安抗辩权的产生条件、法律适用要件及适用后产生的法律效力,对正确贯彻和运用这部法律有积极意义