Abstract: This paper reviewed the applying results and model improvements of Planned Behavior Theory in the fields of HIV sexual risk behaviors. The model could explain HIV sexual risk behaviors in different culture context and samples properly, while it was unstable for the exact prediction of the whole model and the significance of inner variables. Since 21 century the model had been improved greatly as the key variables being operated, new variables being input, and structure relationship being regulated. In spite of that, there was still large developing scope left for such aspects as the model efficacy retest, gender views incorporation, the limitation of individual behavior model, and the intervening applicability of model intensification

Key words: HIV, sexual risk behavior, planned behavior theory, prevention