The preparation method of water-soluble polymer solution is illustrated by examples.

A preparation method of water-soluble polymer material, its preparation steps and conditions include: ② preparation of water-soluble polymer material: polymerizing cationic polymer crosslinking agent with chemical formula 1 prepared in step 1 with monomer system consisting of methacrylamide or acrylamide and water-soluble monomer represented by chemical formula 2 to prepare water-soluble polymer material; General chemical formula 2 is: *, where R7 = h, CH3, R↓[8], R9 = 1-3 alkyl or alkoxy with carbon number, and R 10 = h or 65438+ carbon number. The general preparation methods used in free radical polymerization are all applicable to the invention: aqueous solution polymerization is used when the concentration is 5-30%; When the concentration is 20-70%, dispersion polymerization or inverse emulsion polymerization can be used; The initiators used are initiators suitable for the polymerization of water-soluble polymers, such as azo and redox; The amount of azo initiator is 0.00 1- 1% of the total monomer, and the amount of redox initiator is 0.001-1%of the total monomer; The polymerization was carried out under the protection of inert gas at a temperature of 15-95℃. The water-soluble polymer material is polymerized by 0.0 1-20 mol% of cross-linking agent with chemical general formula 1, 0-50 mol% of methacrylamide or acrylamide and 50-99.99 mol% of monomer system with chemical general formula 2;