The invention relates to a production process of a movable arm of a forklift loader / loading machine and a fine processing fixing tooling of the movable arm. The fixing tooling comprises a base, a main support frame and four fixing mechanisms, wherein the main support frame and the four fixing mechanisms are assembled on the base, a rocker arm connecting hole of the movable arm is assembled in the top of the main support frame through a pin haft, and the four fixing mechanisms are respectively used for fixing the four arm ends of the movable arm. According to the production process, the formed movable arm is obtained after the materials are manufactured through the work procedures of numerical control cutting, point welding, full welding, correction, coarse and fine processing and the like. The technical scheme provided by the invention is adopted for preparing the movable arm, the coaxiality of corresponding holes in the movable arm is effectively improved, the form and location tolerance of the movable arm is small, the rejection rate is effectively reduced, the product quality is also perfectly ensured, the problem that the form and location tolerance correction dimension precision cannot be ensured due to the welding deformation quantity of the original process is avoided, the dependence on experienced workers with special skills in the production and service processes is also reduced, the production efficiency is effectively improved, and the production cost is reduced.