In the presence of Pt catalyst, a kind of long-chain alkyl polyether modified epoxy silicone oil (PCA) was synthesized from hydrogen silicone oil(PHMS), allyl epoxy polyether (AEH) and 1-hexadecene (C16) by hydrosilylation reaction and then reacted with polyether amine, to prepare a long-chain alkyl polyether/amino silicon (PCAD).The chemical structure of PCAD, its emulsion and membrane configuration on the fiber surface were characterized by means of infrared spectroscopy( IR), nuclear magnetic resonance spectroscopy (1HNMR), scanning electron microscopy( SEM), nanoparticle size analyzer and other instruments. The effects of its molar ratio of 1-hexadecenyl to epoxy polyethers, silicone emulsion dosage and the curing temperature of the application performance on the cotton fabric were also discussed. The results show that the average particle size of the PCAD emulsion was 83.7nm, and it had a good film-forming ability on fabric surface. When the molar ratio of 1-hexadecene to allyl epoxy polyether is 8:2, the amount of the emulsion was 15g /L and the curing temperature was 150℃,The softness and water resistance of fabric increased and the whiteness of fabric remained the same. Key words: long-chain alkyl polyether / amino silicon, fabric, consolidation, application performance.