A novel amide sulfonate zwitterionic surfactant (LECN) was synthesized via a two-step reaction using lauric acid, N,N-dimethylethylenediamine, and sodium 3-chloro-2-hydroxypropanesulfonate as raw materials, with the optimal molar ratio of raw materials optimized to 1:1.1:1.1. The critical micelle concentration (CMC) of LECN is 0.05 g·L-1, with a corresponding surface tension of 28.2 mN·m-1. At a concentration of 0.1 g·L-1, it can reduce the cyclohexane-water interfacial tension to an ultra-low level of 0.045 mN·m-1. Its foaming performance (foaming volume of 670 mL, half-life of 1900 s), emulsifying stability (water separation rate of 35.5% within 70 minutes), and temperature and salt resistance (surface tension variation range ≤ 4.7 mN·m-1 at 120℃ and salinity of 120 g·L-1) are all significantly superior to those of reference samples CAB, SDS, and Triton X-10. The synthesis route of LECN is characterized by easily available raw materials, mild reaction conditions, simple operation, and potential for industrial application, providing a new strategy for the development of high-performance zwitterionic surfactants and is expected to promote its application in fields such as petroleum exploitation and daily chemical industry.