Abstract: In recent years, With the proposal of the energy strategic goal of "carbon peak and carbon neutrality", new energy power generation has also made rapid development in China. In order to actively absorb new energy, the role of traditional thermal power units is changing, and they undertake the task of peak load regulation of power grid more and more frequently. At present, the main characteristic of peak shaving of thermal power units in China is that the load changes greatly and the change speed is fast. Under this operation mode, the steam turbine is subject to frequent alternating stress and is prone to equipment failure. In view of this problem, the safety of steam turbine under the background of deep peak shaving unit is analyzed, and corresponding suggestions are given for reference of the same type of unit.。