The invention provides a full-automatic leans shearing machine which comprises a leans conveying mechanism, a lens loading mechanism, a lens shearing mechanism, a lens unloading mechanism and a waste collection mechanism; the leans conveying mechanism is composed of a driving conveying wheel, a driven conveying wheel and two conveyor belts; the two conveyor belts sequentially penetrate through the lens loading mechanism, the lens shearing mechanism and the lens unloading mechanism; the lens loading mechanism is composed of a loading frame and a loading frame drive mechanism which drives the loading frame to move up and down; the lens unloading mechanism is composed of an unloading frame and an unloading frame drive mechanism which drives the unloading frame to move up and down; and the lens shearing mechanism is composed of a shearing lower die, a shearing lower die drive mechanism, a shearing upper die and a shearing upper die drive mechanism. With adoption of the full-automatic leans shearing machine, the technical problems in the prior art that the full-automatic leans shearing machine is complex in equipment structure, low in conveying efficiency and limited in storage space caused by single storage structure are solved, and rapid conveying, efficient shearing and storage in batch of the full-automatic leans shearing machine are realized.