Rainfall erosiveness is a fundamental factor for quantative monitoring and assessment of soil erosion. So it is very important to identify a convenient model or algorithm for assessing rainfall erosiveness. Based on 185 individual rainfalls at three stations in 10 years, R-value was calculated with EI₃₀ and a new algorithm proposed by Bu Zhao-hong, separately. Results showed that the latter suits the region well. Further study of R-value of the region can be carried out by this way. Meanwhile, some issues that should be paid attention to in collecting data were put forward.