The invention discloses a modular integrated hoisting mechanism of a crawler crane, which comprises a rack, a hoist, a clamp plate brake, a three-coil protector and a pawl, wherein the three-coil protector and the pawl are connected on the rack through pin shafts, the clamp plate bake is fixed on a base of the rack through bolts, the hoist is connected with a flange of a planetary reducer through bolts, the fixed end of the planetary reducer is fixed with the rack through bolts, and the hoisting mechanism is integrally connected with a turnplate through pin shafts. According to the invention, the modular design concept is adopted, the hoist, the brake, the three-coil protector and the pawl are modularly integrated on the hoisting mechanism, and the hoisting mechanism is integrally connected with the turnplate through the pin shafts. In assembly and maintenance, the quick assembly and disassembly can be realized, the maintenance space is large, the processing errors can be greatly reduced, the maintenance is simple, the assembly and disassembly are convenient, the assembly and disassembly time can be greatly shortened, the maintenance cost is reduced, and the production efficiency can be improved.