Abstract: In order to study the reliability of the drum structure of hydraulic winch used in mine and its influence on the safety of underground transportation, the structural design and static mechanical analysis of the drum of hydraulic winch used in mine are carried out, and the static strength of the drum is checked by finite element analysis method, and the average equivalent stress and deformation displacement distribution of the drum under rated load are solved. Combining the calculated results with the S-N fatigue life curve of material, the fatigue life and damage distribution of the drum under rated load are predicted, and the sensitivity of the load size to the fatigue life of the drum under non-rated conditions is studied. The predicted results show that the designed winch drum structure meets the requirements of static strength, and the predicted service life is much higher than the designed life. The load sensitivity of the predicted life provides theoretical reference for the design and maintenance of hydraulic winch.