Study the optical fiber′s UV transmission performance,utilize the depressed inner clad design,with different doping content of Ge and F in fiber′s core,use the Plasma Chemical Vapor Deposition process to develop the sample fiber,and adopt the same drawing process control to fabricate the fiber sample.Through contrast the samples′ optical characters,attenuation sprctrum and UV transmission efficiency and stability,get the influence of the fiber′s UV transmission performance by the doping content.With the increase of the Ge and F doping content the fiber′s 305 nm laser transmission efficiency would decrease obviously.The UV laser transmission efficiency changed from 99.3%~97.8%.This would be caused by the increase of the defects content in the fiber′s core,and then it would decrease the UV laser transmission efficiency.However,with the increase of the Ge doping content,the fiber′s UV transmission stability would increase from 904%~97.2%.The results indicate that:the fiber′s UV transmission efficiency was directly influenced by the Ge doping process,then the transmission stability was influenced by the other doping element,the new defects have been generated.