1,6-hexamethylene diurethane was synthesized with allyl polyoxyethylene ether and hexamethylene diisocyanate as raw material in the presence of tin catalyst. Gemini polyoxyethylene ether trisiloxane surfactant (GPETS) was prepared by the hydrosilylation from 1,1,1,3,5,5,5-heptamethyltrisiloxane(MDHM) and 1,6-hexamethylene diurethane in the presence of Pt catalyst. The chemical structure of GPETS was confirmed by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance. The interfacial properties of GPETS were studied. GPETS can reduce the surface tension of water to approximately 22.0 mN?m-1 at the concentration of 5.9?0-5mol?L-1. The hydrolytic stability of GPETS was compared to polyoxyethylene ether trisiloxane surfactant in different pH value. The result showed that the hydrolytic stability of cationic polyether trisiloxane surfactant is better than the latter, suitable for use in the wide range of pH value.