Paper folding machine of pop-up book

The invention relates to a paper folding machine of a pop-up book. The paper folding machine comprises a rack, a paper clamping device, a paper bending mechanism and a paper pushing, pressing and forming mechanism, wherein the rack is used for providing an installation and supporting base for each component; the paper clamping device is arranged on the paper bending mechanism; the paper bending mechanism comprises a driving motor, an upper template and a lower template, and the paper bending mechanism is connected with the paper pushing, pressing and forming mechanism; the paper pushing and forming mechanism can push the lower template to stretch and contract. According to the paper folding machine disclosed by the invention, automatic completion of a paper folding procedure during a manufacturing process of the pop-up book is realized, the duplicate work of a human is relieved, the labor intensity is reduced, the production efficiency is increased, and the production cost is also reduced.