The invention discloses a preload interference precision rolling method for the leaf blade of a rolling mill and special equipment thereof, which is characterized in that: load is preloaded on the rolling mill, the preload is 1.1 to 1.3 times larger than the resisting force generated by the roll milling of the leaf blade; the resisting force generated by the leaf blade satisfies the following formula: F is equal to SE, wherein, F is the resisting force generated by the leaf blade, S is the elastic deformation value generated by equipment and forming tools, and E is the elasticity modulus of the equipment and forming tools. The special equipment comprises a preload interference mechanism, a mill setting mechanism, a mill forming mechanism and a mill hydraulic mechanism. The invention changes the traditional mechanical structure and processing method, improves the product performance, and can be used for the rolling of the leaf blade of an engine.