Chemical Enhanced oil recovery (cEOR) is a technique to recover residual oil from light oil reservoirs by using surfactant, polymer and/or alkali. In cEOR, polymers are used to increase the viscosity of displacing fluid. Enhanced viscosity of displacing fluid will improve mobility ratio and increase macroscopic and microscopic displacement efficiency. As most of the remaining oil is in the deeper and hotter reservoirs, conventional polymers like hydrolysed polyacrylamide (HPAM) are not suitable at high-salinity high-temperature conditions. HPAM suffer a huge viscosity loss due to charge shielding effect and hydrolysis of amide group. In the presence of divalent cations hydrolysed product may also precipitate. In this work we propose a novel class of water soluble polymers for EOR applications. The thermos-thickening polymers have unique rheological properties at high temperatures. In TVP, a thermos-sensitive monomer is incorporated onto the main chain. Increasing the temperature of thermo-thickening polymer aqueous solution from a lower critical solution temperature , will results in the formation of physical network. This formation of physical network will results in the viscosity enhancement. Such type of viscosity behavior is highly desirable in EOR applications. The lower viscosity at low temperatures will make the pumping operation more cost effective. As the flooding liquid move down the reservoir, formation of networks increases the viscosity due to increase in the temperature. Effect of different inorganic salts and counter ions was investigated on the rheological properties of the thermo-thickening polymer. These salts include: sodium chloride, calcium chloride, magnesium chloride and sodium sulphate. For all types of salts it was observed that steady shear viscosity and storage modulus decrease initially at lower salinity. But at higher salinity, storage modulus and steady shear viscosity was much higher compared to salt-free solution.