Ultraviolet sterilization and filtration pump placed in aquarium

The utility model relates to an ultraviolet sterilization and filtration pump placed in aquarium, which is composed of a pump head assembly, a filter vat assembly, a germicidal lamp assembly, a ballast box assembly and a sucker bracket; wherein the pump head assembly, the filter vat assembly, the germicidal lamp assembly and the sucker bracket are integrated and immersed in any position of the fish bowl. Thereby the utility model integrates functions of sterilization, filtration and pumping with simple connection, easy mounting and dismounting, little space occupied and without problem of leakage. Furthermore, the ultraviolet germicidal lamp is added to reinforce the sterilization performance and thereby improve water quality in the fish bowl.