Based on the Preisach model for hysteresis loop, the resistance hysteresis loop characteristic of thermosensitive VO2 thin film is theoretically analyzed. The resistance characteristics dependent on temperature in the resistance hysteresis loop can be obtained through theoretical numerical calculation, and the numerical calculated results are in good agreement with the experimentally measured results of some VO2 thin film samples in our laboratory. The resistance characteristics calculated results can be utilized to predict the infrared respons...