This paper introduces the principle of testing fiber strain by using the Brillion scattering.In view of the deficiency of the BOTDR technology in monitoring fiber micro-strains

it presents a Support Vector Regression（SVR）-based method for Optical Power Ground Wire（OPGW）strain analysis.In this method

it builds a model for the frequency shift variations of fiber sections under different tensile forces

maps the vector to high-dimensional space using the kernel function and makes regression analysis by using the SVR method.Experimental results prove the effectiveness of this algorithm and demonstrate its huge potential in OPGW anomaly detection.