The invention relates to an emulsifier, in particular to a salt-tolerant emulsifier and a preparation method thereof. The salt-tolerant emulsifier is prepared from 60 parts of
cyclomethicone, 20 parts of polyglycerol-3 diisostearate and 20 parts of PEG-9 (
Polyethylene Glycol)
polydimethylsiloxane. The preparation method of the salt-resistant emulsifier comprises the following steps: carrying out hot melting on polyglycerol-3 diisostearate and PEG-9
polydimethylsiloxane, and stirring and mixing to obtain a first mixture; cooling the first mixture to 8-10 DEG C during low-speed stirring, and dropwise adding
cyclomethicone during low-speed stirring to obtain a second mixture; standing the second mixture to recover normal temperature, pressurizing and stirring at a high speed to obtain a salt-resistant emulsifier; the invention proves that the layering of the mixed emulsifier in a high-salt environment can be relieved by adding the PEG-9
polydimethylsiloxane; in addition, the PEG-9 polydimethylsiloxane has the effect of conditioning the
skin, can reduce the
irritation, enables the
skin to show natural luster, and has the lubricating and moisturizing effects.