The present invention relates to an alternately-stacked laminated secondary battery and a manufacturing method thereof. The disclosed secondary battery is formed by alternately stacking integrally formed monopolar groups and positive and negative monopolar sheets, thereby reducing cases where the battery performance is not satisfactory due to poor positive and negative monopolar sheets. The existing problems can be effectively solved by manufacturing the laminated secondary battery according to the method provided by the present invention. The monopolar groups and the pole pieces are alternately stacked, and the manufacturing process of the monopole groups and the pole pieces is relatively simple. In the process, the defective products can be effectively screened in advance, and the reworkfrequency can be significantly reduced. Moreover, the invention uses a monopolar group and monopolar sheet stacking method, which can effectively reduce the initial investment cost of a monopole group and the monopole sheet manufacturing apparatus.