High-precision manufacturing control method including: designing components, parts and electromechanical equipment components, setting precision technical requirements for concentric and geometric tolerances of parts and components with structures while designing, disposing omnidirectional precision-adjustable movable precise-control components and parts in multi-surface cubes of components and parts with or without rotary or movable components and parts, rail kinematic pair parts with guide of components, parts, mechanical and electromechanical components, respectively disposing omnidirectional adjustable static precision control components and parts in multi-surface cubes of components and parts combined components and parts of the above-mentioned omnidirectional precision-adjustable movable precise-control components and parts, disposing omnidirectional precision-control adjustment components and parts at orientations among components and parts and combinations; manufacturing components and parts according to indications; assembling, performing fine adjustment by comparing and calculating values measured and technical requirements set by design, enabling the above-mentioned combinations to meet requirements for concentric and geometric tolerances, respectively, then locking.

Provided is an apparatus for piston insertion, including an insertion robot having a plurality of robot arms connected by a plurality of articulated joints, a piston insertion module directly mounted on the insertion robot, gripping a piston assembly, and inserting the piston assembly into a cylinder bore of a cylinder block, and a controller controlling an operation of the insertion robot and an operation of the piston insertion module.