“Processing efficiency theory” considered that anxiety impaired attention control which was the core of the executive function and then anxiety people may have poor performance on executive function, while others found that anxiety did not have impact on executive function, It is still an open question whether the cognition of anxiety people was damaged. Anxious people are easily distracted by threat-related information and are impaired in their ability to regulate attention to threatening stimuli. This attentional bias in favor of threat-related information is well established for both clinical anxiety and trait anxiety in the nonpathological range. Consequently, emotion stimulus may affect the cognition of anxiety people than that of normal participants. The present study investigates how different emotions affect the cognition inhibition for trait anxiety participants. A 3 (emotion type: positive, negative, neutral) × 3 (task type: congruent, incongruent, irrelevant) × 2 (participant type: trait anxiety, normal) mixed experiment design was carried out. 144 pictures were selected from CAPS (48 positive, 48 negative, 48 neutral) to induce participants’ emotion, Stroop task was used to induce cognition inhibition. Fifty-seven participants selected from 1055 university students took part in the experiment, the students whose score on the trait anxiety questionnaire exceed 57 for girl and 56 for boy were labeled as trait anxiety participants and the students whose score on the trait anxiety questionnaire below 30 were labeled as normal participants. We found that the Stroop effect of trait anxiety was larger than that of normal participants. The Stroop effect after positive and negative emotion were larger than that after neutral emotion. The results illustrated that the cognition inhibition which was destroied of trait anxiety was impaired by positive and negative emotions for all the participants.