In order to lower the costs, and reduce the use of devices such as osillograph and fast response photodiode in SG Ⅱ, the ultraviolet optical fiber is used to sample and integrate measurement for the high power ultraviolet nanosecond laser pulse. Through the theoretical analysis and simulation study of the propagate characteristics and the condition of distortionless propagation of the high power ultraviolet nanosecond laser pulse in the optical fiber, different core diameter fibers are chosen to carry on the experimental research. It shows that the distortion is low when the high power ultraviolet nanosecond laser pulse propagates in the 25 μm core diameter fiber. The 25 μm core diameter optical fiber is suitable for long distance propagation and is a preferable medium for fiber sampling and propagating. A demonstrative experiment is taken to prove the feasibility of integrate measurement. These results provide theoretical and experimental basis for the high power laser pulse integration measurement of SG Ⅱ.