The invention discloses a lithium cell laminator and a laminating process, for solving the problem of poor laminating effect. The lithium cell laminator comprises a first diaphragm releasing mechanism, a positive electrode plate releasing part, a second diaphragm releasing mechanism, a positive electrode plate thermal sealing part, a folding part, a negative electrode plate releasing part and an arranging part which are arranged from an initialing end to a finishing end in sequence, wherein a first diaphragm drops on a traction belt and paved, and then positive electrode plates are released; the adjacent positive electrode plates are arranged in an axial symmetrical manner; then a second diaphragm is released; next, after performing thermal sealing, the positive electrode plates are fixed between the two layers of diaphragms to be distributed uniformly in an interrupted manner to form a diaphragm band; the diaphragm band is subjected to Z-shaped continuous folding through the folding part; negative electrode plates (B) are released by the negative electrode plate releasing part during folding; and finally, a lamination sheet with the diaphragm band and the negative electrode plates that are arranged in a tidy manner is formed through arranging. The lamination automatic degree is high, and the overall process is automatically completed by a machine without requiring human intervention, so that the automatic production level is improved and the efficiency is improved.