Ultraviolet disinfection device

The utility model discloses an ultraviolet disinfection device. The device comprises a box body, a disinfection cavity for carrying out disinfection operation on water is formed in the box body; a power distribution bin is arranged at the front end of the box body; a plurality of holes communicated with the disinfection cavity are formed in the left side of the box body; a light-transmitting tubeis inserted into the hole; the end, inserted into the disinfection cavity, of the light-transmitting tube is closed; a sealing plug is matched between the light-transmitting tube and the hole; the left end of the light-transmitting tube is positioned outside the box body; wherein one end of the power distribution bin is communicated with the other end of the power distribution bin, a lamp holder is inserted into the left end of the light transmission tube, an ultraviolet lamp tube is assembled through the lamp holder, the ultraviolet lamp tube is sealed in the light transmission tube, a PCB isfixed in the power distri