The invention provides a side chain type sulfonated polyaryletherketone proton exchange membrane material containing a diphenyl hexafluoride isopropyl structure. A hydrophilic structure unit contains four side chain type sulfonic acid molecules, and a hydrophobic structure unit contains the diphenyl hexafluoride isopropyl structure and a triphenyl diketone structure. A preparation method of the sulfonated polyaryletherketone proton exchange membrane material comprises the following steps: using three monomers of active bisphenol 9,9-di(3-phenyl-4-hydroxy) benzofiurene containing a phenyl lateral group structure, active bisphenol 2,2-di(4-hydroxyphenyl) hexafluoropropane containing the diphenyl hexafluoride isopropyl structure, and active difluoride ketone 1,4-di(4-flurobenzoyl) benzene to prepare a polyaryletherketone resin containing the diphenyl hexafluoride isopropyl structure through aromatic nucleophilic polycondensation under the alkaline condition; further utilizing a concentrated sulfuric acid as a sulfonating agent, and sulfonating under the mild reaction condition, so as to prepare the side chain type sulfonated polyaryletherketone proton exchange membrane material containing the diphenyl hexafluoride isopropyl structure. The side chain type sulfonated polyaryletherketone proton exchange membrane material is simple in preparation process and excellent in membrane-forming property; and a prepared thin polymer membrane has excellent comprehensive performances, and can be applied to the proton exchange membrane material for a solid-state fuel cell.