The micellization behaviors of binary mixtures constituted by an amphoteric surfactant, sodium 3-(N-dodecyl ethylenediamino)-2-hydropropyl sulfonate, and a nonionic surfactant octylphenol polyoxyethylene ether (10), OP-10, in aqueous solutions containing seven inorganic salts were investigated. The values of mixed critical micelle concentration (cmc(M)) were determined by both the tensiometry and the UV-vis spectroscopy method using pyrene as a probe. The dependence of cmc(M) on inorganic salt was established. According to different theoretical models, the components in mixed micelle, interaction parameters between two surfactants, etc. were obtained. Upon adding inorganic salt, the component in real mixed micelle is inferior to the ideal case, indicating component in mixed micelle. For all mixed surfactant synergistic effect. Thermodynamic parameters show that inorganic salt promotes the process of micellization. The effect, electrostatic shielding effect, and steric effect. And understanding the micellization behavior between especially relative to aqueous salt solutions.