The utility model discloses a junction box for a photovoltaic microgrid. The junction box comprises a junction box body, A circuit board is fixedly connected into the junction box body through a fixing frame. the circuit board is fixedly connected with a connecting block; The junction box body is provided with a cable insertion port. the cable inserting port corresponds to the connecting block; two cavities are symmetrically formed in the junction box body at the cable insertion opening; a first strip-shaped hole and a second strip-shaped hole are respectively formed in the symmetrical side walls of the cavity; Partition plates are fixedly connected into the cavity, sliding grooves are formed in the symmetrical end faces of the partition plates respectively, first sliding blocks are slidably connected into the sliding grooves formed in the end faces, close to each other, of the two partition plates respectively, the two first sliding blocks are fixedly connected with one ends of two baffles respectively, and the other ends of the two baffles penetrate through the first strip-shaped holes to reach the interior of the cable insertion opening. The junction box is simple in structure and convenient to operate, can well overcome the defects that in the prior art, the connection position of the junction box and a cable is unstable in combination, and input and output are easy to be unstable, and has high practicability.