1- phenoxy -3- alkoxy -2- propanol film forming auxiliaries were synthesized from benzyl alcohol, isopropyl glycidyl ether and n-butyl glycidyl ether.The optimum process conditions were investigated as follows: N (benzyl alcohol)∶ N (alkyl glycidyl ether)=1∶1.5, reaction temperature 120℃, reaction time 9h, catalyst as compound catalyst (m sodium methoxide∶ m tetrabutylammonium bromide = 2∶1), catalyst dosage 0.8%(total mass ratio).The chemical structure of the film forming auxiliaries was verified by FTIR and 1H NMR spectra.The boiling points of 1-phenoxy-3-isopropoxy-2-propanol film forming assistant and 1-phenoxy-3-n-butoxy-2-propanol film forming assistant were determined as 267℃~270℃ and 276℃~280℃ respectively.Explores the application of synthesis of film forming additives in latex paint, respectively made in the minimum film-forming temperature, coating surface morphology AFM figure, light transmittance of coating, coating hardness, water absorption and heat storage stability of the coating, color and water resistance test, the results said synthesis of film forming additives overall performance is superior to the traditional film forming additives 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate.