Abstract: An associated salt-tolerant polymer p(AM/AMC12S/GTE-10) was prepared by reverse-phase emulsion polymerization using acrylamide (AM), 2-acrylamide-sodium dodecyl sulfonate (AMC12S) and hydrophobic monomer GTE-10 as materials. The structure and rheological properties were characterized by FTIR, 1HNMR, SEM, TEM and laser particle size analyzer. The results showed that the hydrophobic monomer GTE-10 was successfully introduced into the polymer, and the particle size distribution of the emulsion after polymerization was concentrated and uniform. The addition of salt made the aggregation of p(AM/AMC12S/GTE-10) molecules more compact, and the spatial network structure formed was more stable. p(AM/AMC12S/GTE-10) polymer aqueous solution with a mass fraction of 0.7% showed good temperature resistance at 140 ℃. After shearing at 120 ℃ and 170 s-1 for 1 h, 0.7% polymer solutions were prepared in 20,000 mg/L NaCl and CaCl2 aqueous solutions with viscosities of 64.7 and 54.2 mPa·s, respectively. The thixotropic tests show that the polymer has good shear recovery performance. The results of viscoelastic test show that the energy storage modulus (G ") is higher than the loss modulus (G "), and the metal ion and phenoxyethylene group have complex reaction, which enhances the intermolecular force, and the formed spatial structure is more stable and difficult to be destroyed, and the viscoelastic is higher.