A multilayer blank collection machine comprises a frame and a working table. The multilayer blank collection machine is characterized in that a liftable stacked-material-plate conveying device, a material plate pushing device, a blank pushing device, a stacking device for blank-carried material plates and a liftable discharging device for stacked blank-carried material plates. During use, a feed lifting platform in the middle of a feed conveying belt structure lifts stacked material plates to a working table faucet; a material plate pushing rod of the material plate pushing device pushes the stacked material plates to the front side of the blank pushing device, and pushes the blank-carried material plates to the stacking device for the blank-carried material plates after the material plates are full of blanks; a clamping air cylinder drives a clamping plate to put the blank-carried material plates to an ascended discharge lifting platform in the middle of a discharge conveying belt structure; an isolation column is released by an isolation column holding air cylinder, the discharge lifting platform descends, and the material plate pushing rod ascends to return to an original position and descends to repeat the operations. The multilayer blank collection machine has the advantages of novel structure, stability and reliability in working and high efficiency.