The invention provides a disassembling device. The disassembling device is used for disassembling an assembly, wherein the assembly comprises a first base plate and a second base plate which arranged oppositely; an adhesive is arranged between the first base plate and the second base plate; the disassembling device comprises two fixing mechanisms which are arranged oppositely; the two fixing mechanisms are used for fixing the first base plate and the second base plate respectively; the getting-close or getting-far relative movement can be generated between the two fixing mechanisms; the disassembling device further comprises an adhesive treatment mechanism for treating the adhesive, so that the adhesion force between the treated adhesive and the first base plate is smaller than the adhesion force between the untreated adhesive and the first base plate; and/or the adhesion force between the treated adhesive and the second base plate is smaller than the adhesion force between the untreated adhesive and the second base plate. By virtue of the disassembling device, the first base plate and the second base plate, which are mutually adhered, can be effectively disassembled.