Objective To carry out lifespan prediction and reliability analysis on structural components of products matching thetrack vehicle under harsh vibration and impact circumstances. Methods Through the design and analysis of failure mode analysisand probability, and with the aid of the probability of professional analysis software, the failure probability analysis and the quantitativelife prediction of chassis structure were carried out. Results The work risk duration of chassis structure was determined. Importantparts of design parameters were identified. Important characteristics and inspection requirements of the structure were determined.And schedule of inspection unit form important characteristics was formed. Conclusion With reference to the aboveanalysis, in structure design and processing, monitoring the quality of higher sensitivity of parameters is the key.