The invention discloses a tableting mechanism and method. The mechanism comprises a first tableting device and a second tableting device, the first tableting device comprises a first drive device, the first drive device comprises a first drive piece, a first connecting block and a first inverted L-shaped slide block; the method comprises the following steps: 1, compressing a pole piece to a first emptying position through a pressing claw of the first tableting device; 2, compressing a pole piece through a pressing claw of the second tableting device; 3, enabling the first drive device of the first tableting device to drive the pressing claw to slightly ascend to a set position; 4, enabling a laminating platform to drive a diaphragm back to the emptying position in the step 1; 5, enabling the first tableting device to move forward to the set position, and enabling the pressing claw of the first tableting device to descend to compress the pole piece. According to the tableting mechanism and the tableting method provided by the invention, the pole piece of a lithium battery is laminated through reciprocating movement, the first drive device is arranged on the tableting mechanism to slightly lift the pressing claw of the laminating device, the pressing claw is not in contact with the pole piece in withdrawal process, the scratch of the pole piece is avoided, and the pole piece of the lithium battery is effectively protected.