Abstract: At present, the classical and common human reliability analysis (HRA) methods are studied before the digitization of the main control room. Based on the training video of the simulator, this paper defines, collects and analyzes the operator's operation behavior in the digital main control room by using the behavioral method. The results show that the  operation error probability of the operators is normal in the digital main control room, but the secondary task operation and its human error probability increases. Therefore, this study provides a basis for HRA of the operators in the digital main control room.