The invention discloses a bottom box manufacturing device and method for a packaging box. The bottom box manufacturing device and method for the packaging box are used for manufacturing a bottom box including a lining structure, wherein the bottom box manufacturing device comprises a bottom box conveying device, an opening device and a stamping device.The opening device and the conveying device are respectively connected with the stamping device. The bottom box manufacturing device and method effectively solve the problem that the lining structure needs to be adhered manually in an existing packaging box forming technology.The bottom box manufacturing device and method does not need manual operation,can change the state of the lining structure of the bottom box from a folded state to an opened state,and enables the lining structure in the opened state to be in contact with and fixedly connected with the bottom box.Therefore,working efficiency is improved, manpower cost is saved,the quality of the bottom box including the lining structure,which is manufactured through the bottom box manufacturing device for the packaging box, is stable in quality and good in using performance.