Attention training technique is an important component of metacognitive therapy， and the effectiveness has been fully validated. It can be used as an independent intervention to significantly reduce individuals' anxiety levels. This technology enhances an individual's attention control ability and improves attention flexibility. It can effectively interrupt the thinking patterns that lead to maladjustment， thereby achieving the goal of relieving anxiety. This article provides a review from three aspects： the origin， intervention， and mechanism of attention training technique， in order to provide reference for the treatment and further research of anxiety patients.