The Chinese citrus fruit fly Bactrocera (Tetradacus) minax (Enderlein) is one of the most harmful pests for fruit crops. Few studies have been conducted to determine the ovipositing behavior of this species, and little is known about the movement rhythms of the adults after their emergence. In this study,the movement rhythms of B.minax adults was revealed after their emergence and the oviposition preference of females was observed through field investigations. The results indicated that the majority of B.minax adults flied around the junction zone of mixed woods and orchard in the period of over twenty days after the emergence. And it reached a peak on June 11th, we trapped (24.0±5.6) insects per pot in a 5 m zone of mixed woods in the peak period,while the date was (74.7±21.9) insects per pot in the 5 m zone of orchard, which was significantly higher than that in other trapping zones. In the peak period of emergence, more than sixty percent of the adult B.minax flied around the junction zone. After the emergence peak,the distribution of B.minax in orchard tended to be uniform. Except that no B.minax adults was trapped in the sampling zone designated as 100 m zone in mixed woods, the trapped numbers of B.minax in other sampling zones showed no significant difference. Additionally,the greatest number of oviposition marks of B.minax were found to be in the middle of an orange, which were significantly more than those in two other parts such as the stem end and the fruit navel. Furthermore, the number of oviposition marks in the dark side of orange was seven times higher than those in the sunny side. It suggested that B.minax females preferred to oviposit in the fruit night side. However,B.minax females showed no preferences to the oranges from different locations.