The invention relates to a junction box, in particular to a glue-filling waterproof photovoltaic junction box which is provided with a box body with a cavity and a box cover, wherein one side of the box body is provided with a connection cable through hole through which a placed cable is penetrated; two clamping modules are arranged in the middle part of the cavity, and buckles are arranged at two sides of the bottom part of the cavity; the two clamping modules are clamped with a metal terminal respectively, a diode is connected between the two metal terminals, and the bottom parts of the metal terminals are connected with the cable; and the two buckles are respectively clamped on two clamping hooks at two sides of a clamping groove, and the clamping groove is pressed on the cable. The glue-filling waterproof photovoltaic junction box adopts a small-volume box design, thus reducing glue-filling quantity and saving cost; pressing and clamping manners among elements are adopted in manufacturing and processing of the junction box, thus avoiding use of mechanical connection and achieving energy conservation and environmental protection; and a glue-filling manner is adopted for sealingthe junction box, thus improving tightness and water resistance.