In high-viscosity processes such as polymer polymerization and resin synthesis, conventional reactors commonly suffer from problems such as material buildup on the reactor walls, uneven heat transfer, material accumulation in dead corners at the bottom, and inconsistent polymerization degrees of materials, directly affecting product qualification rates and batch stability. Our factory has optimized the reactor jacket and internal heat exchange coil structure for pilot-scale and small-batch production scenarios, adopting a full-area coverage heat transfer design to eliminate heat transfer blind spots at the top and bottom of the reactor and at the junction of the end caps. Combined with a customized frame-type + paddle-type composite stirring structure, it adapts to the dragging and mixing requirements of high-viscosity materials. Low-speed, high-torque stirring ensures uniform material flow throughout the reactor, eliminating static material accumulation dead corners. Simultaneously, the reactor inner wall polishing process has been optimized to reduce material adhesion and minimize coking. The entire structure achieves a reactor internal temperature error within ±1℃ without increasing heating power, perfectly adapting to polymerization processes such as polyurethane, epoxy resin, and polymer emulsions, solving the core problems of uneven heat transfer and batch deviations during pilot-scale production.