Preparation method of current collector-free battery and current collector-free battery

The invention discloses a preparation method of a current collector-free battery and the current collector-free battery. The method comprises the following steps: preparing positive electrode dry powder slurry, negative electrode dry powder slurry and solid electrolyte dry powder slurry; performing hot pressing on the positive dry powder slurry through a hot press to obtain a positive pole piece, and connecting a first metal sheet to the end part of the positive pole piece to serve as a positive pole lug; performing hot pressing on the negative electrode dry powder slurry through a hot press to obtain a negative electrode plate, and connecting a second metal sheet to the end part of the negative electrode plate to serve as a negative electrode lug; carrying out hot pressing on the solid electrolyte dry powder slurry through a hot press to obtain a solid electrolyte film; sequentially stacking the positive pole piece, the solid electrolyte film and the negative pole piece, and then carrying out mixed hot press