In the process of simulated cutting, the high dust concentration of the cutting part experimental platform of the roadheader will cause the problems of poor visualization and low safety of the real-time monitoring of the cutting state of the roadheader. Therefore, a real-time monitoring method of the cutting state of the roadheader based on digital twin is proposed. Firstly, the five-dimensional model architecture of the experimental system of the cutting part of the digital twin roadheader is drawn. Secondly, based on UE 5 software, the digital twin of the roadheader cutting unit experimental system is developed, which mainly includes the construction of the digital scene of the cutting unit, the transmission and management of twin data, and the mapping of virtual and real data. Finally, the digital twin integration function is verified by the roadheader cutting experiment. The experimental results show that the use of digital twin technology to realize scene roaming can effectively improve the visual monitoring effect of roadheader cutting state, and provide guarantee for the safety of cutting experiment.