In order to measure the growth stress of log more accurately by strain gauge and solve the problem of internal stress measurement,growth stress measuring process in logs using slitting method was simulated in the paper.The measurement models with different crack depth are established,and the influence of the distance from crack to strain foil are also investigated.In addition,the growth stress field model is established by temperature-stress field analogy.Simulation results show that the distance from strain gauge to crack should better be between 0.3 and 0.5 times of the log radius.As for crack depth,when the crack depth reaches 15%of the log radius,the strain gauge can measure 45%of the initial stress.By calculating the difference between different stress-depth curves of the crack slitting,the inner stress in the logs with non-uniform stress distribution can be measured.