Taking acrylamide,acrylic acid,and sodium 2-acrylamide 2-methylpropane sulfonate as monomers along with double bonds modified nano materials(functional monomer),DW-1,a lotion thickener for fracturing-oil displacement integrated working fluid,is synthesized via lotion polymerization method.Some polymerization conditions are optimized with the dissolution rate,thickening ability,and wettability as evaluation indicators.The optimum polymerization conditions for the lotion thickener are obtained as follows:the concentration of monomer is 25%,the amount of functional monomer is 0.2%,the dosage of initiator is 0.12%,the polymerization temperature is 25℃,and the polymerization reaction is 3 h.The rationality of design of the molecular structure is proved by means of infrared.This lotion thickener has good solubility and thickening properties,and its viscosity in 1 minute can exceed 90% of the maximum viscosity,which can be used to prepare an integrated fracturing fluid.The fracturing fluid prepared from this thickener presents good temperature resistance and shear resistance,with a resistance reduction rate greater than 70%.The oil displacement efficiency of the gel breaking fluid with the thickener is as high as 15.63%.