A “solar blind” ultraviolet photomultiplier is a key detector for ultraviolet warning systems andultraviolet communications. It exhibits the characteristics of high radiation sensitivity, high gain, highresolution, and low noise. Therefore, ultraviolet photomultipliers are an important research topic undervacuum devices worldwide. Herein, a “solar blind” ultraviolet photomultiplier developed by NVT isintroduced from four aspects: structure design, cathode preparation, microchannel plate, and whole tubesealing. A .18 mm Cs2Te photocathode was evaporated on an MgF2 window through anti-reflectiontechnology, which resulted in a radiation sensitivity at 250 nm increasing from 22 to 26.5 mA/W. The signalrise time is less than 500 ps, and the TTS is less than 0.1 ns; these are obtained by electron optics simulation.The gain of the microchannel plate reached 5.106 via structure optimization and atomic layer depositiontechnology. The indium sealing technology of glass/Cr/Cu/Ag multilayer metal film is adopted to improvethe qualified rate of the entire tube sealing to 97%.