The invention discloses an industrial synthesis method of a poly(aromatic ether sulfone) resin with a high solid content. The synthesis method comprises the following steps: taking 4,4'-dichlorodiphenyl sulfone and 4,4'-biphenol or 4,4'-dihydroxyl diphenyl sulfone as the reaction monomers, sulfolane as the solvent, and sodium carbonate as the salt forming agent, adding the solvent into a reactor filled with nitrogen gas, then stirring, heating to a temperature of 60 to 80 DEG C, orderly adding the reaction monomers, fully dissolving the monomers, adding the salt forming agent into the reactor, then adding a water separating agent, keeping on stirring, heating to a temperature of 200 to 210 DEG C, carrying out salt forming reactions for 1 to 2 hours; completely evaporating the water separating agent after the salt forming reactions, then transporting the salt forming reaction products to a polymerization reactor to carry out reactions; wherein the solid content of the system in the salt forming phase is 20% to 25%, and the solid content of the system in the polymerization phase is 35% to 45%; cooling the polymerization sticky liquid after the polymerization reactions, grinding into powder, filtering, then boiling and washing with deionized water to remove the solvent and byproduct namely the salt, and finally drying so as to obtain the target product. The synthesis technology can reduce the using amount of solvent sulfolane, shortens the polymerization time, and increases the output.