The invention relates to a longitudinal continuous manufacturing device of laminated batteries. The longitudinal continuous manufacturing device comprises a laminated unit molding mechanism (1), a laminated unit detection mechanism (4), a first hot pressing mechanism (5) and longitudinal battery cell forming mechanisms (2), which are sequentially arranged along the conveying direction of a conveyor line (6), wherein the laminated unit molding mechanism (1) is used for fabricating laminated units; the laminated unit detection mechanism (4) is used for detecting the alignment precision of pole pieces when the laminated units are fabricated, and eliminating laminated pieces with unqualified precision; the first hot pressing mechanism (5) is used for carrying out hot pressing on the laminated units; and the longitudinal battery cell forming mechanisms (2) are used for stacking the laminated units and assembling the laminated units into laminated battery cells. The pole pieces are quickly manufactured into the laminated units on a production line through the laminated unit molding mechanism; the laminated units are quickly and accurately superposed through the longitudinal battery cell forming mechanism to form the battery cell; large-batch battery cell manufacturing is continuously and quickly finished; the integrity of the battery cells is ensured; and the production efficiency of producing the laminated batteries is greatly improved.