Abstract: The tyre service life of chock carrier has an effect on safety traffic and maintenance economy about itself. In the word, the characteristics of the tyre abnormal shrinkage about chock carrier are discussed. Based on the vehicle reasons and external factors, the tyre shrinkage reason is analyzed in detail. From various subjective and objective sides, the measures and suggests to overcome the tyre abnormal shrinkage are proposed reasonably, and some effective methods that can increase the tyre service life of chock carrier are suggested.