The invention discloses an easy-to-install photovoltaic junction box for a laminated battery. The photovoltaic junction box comprises a bottom plate and a box body buckled with the bottom plate. An electrical connection assembly is arranged inside the box body. Wiring notches are formed in the box body; and a plugging type cover plate is arranged on the wiring notches. The electrical connection assembly includes three conductive copper sheets arranged side by side; the conductive copper sheets include plate type bodies; an L-shaped connecting end piece is arranged at one end of each plate typebody; and a cable connection port with a U-shaped cross section is formed in the other end of the plate type body. The cable connection ports are connected with end portions of cables passing throughthe wiring notches by tin soldering blocks. The ends, extending out of the box body, of the cables are provided with connectors. Diode clamping blocks are arranged at the two sides of the surfaces ofthe plate type bodies; diodes are erected between the diode clamping blocks of the adjacent conductive copper sheets; and pairs of positioning holes are formed in the plate type bodies of the conductive copper sheets. Positioning posts corresponding to the positioning holes formed in the conductive copper sheets are arranged in the box body.