The green turtle (Chelonia mydas) is a globally endangered species and listed as Class Ⅰ of protected animals in China. Habitat conservation is an important and effective conservation strategy for this species. However, the habits and habitat of juvenile green turtles in China are not clear yet. We six tagged juvenile green turtles aged from 2 to 14 years old from the Huidong National Sea Turtle Reserve of China with six satellite transmitters, including two American Wildlife Computer trackers (Spot5- AM-S181C, n = 1; Spot5-AM-S244A, n = 1), and four Telonics trackers (TAM-2639) (Table 1) between 2011 and 2015. We released them in the summer (n = 3) and in the winter (n = 3). The global ARGOS system was used to carry out an all-weather tracking and monitoring, and the geographic coordinate data were filtered and analyzed using the satellite tracking and analysis tool (STAT) software. We obtained a total of 397 effective locations for the four years (including 62 obtained from previous studies). GIS layers were then generated and overlaid with MapTool software to reveal the migration of juvenile green turtles. The SPSS software t-test was used to determine statistical difference between the two season data on individual size and minimum travel speeds The curve carapace lengths (CCL) in the turtle released in winter and in summer were with 48.9 ± 8.65 cm (n = 3), and 59.07 ± 7.64 cm (n = 3), respectively, with no difference between the two groups (t = 1.527, df = 4, P = 0.202). The average tracking period was 66 ± 47 d (n = 6), and the tracking distance was 1 653 ±1 585 km (n = 6). The average minimum travel speed in the summer group was 1.63 ± 0.22 km/h (n = 3), which is longer than those turtles in winter group (0.67 ± 0.12 km/h, n = 3; t = 6.726, df = 4, P = 0.003). They migrated to Taiwan in summer and to Hainan in winter, along and within the 140 m isobath of the continental shelf. The migration directions of all individuals were as same as the monsoon currents of the sea during the same period (Fig. 1). Homing behavior was observed only in the winter group (Fig. 2). The over-winter sites were mainly distributed in Con Co Island of Vietnam and the eastern part of Hainan Island, whereas the over-summer habitats were located between Fujian and Zhejiang, but all were within the 20 m isobath and with concentrated distribution of macro-algae, seagrass beds, or coral reefs. The activity area overlapped with the offshore fishing ground and other development areas, which was consistent with the results of previous research. The captive juvenile green turtles could migrate normally, forage, and adapt to the wild environment after being released, and they tended to migrate seasonally between the East China Sea and South China Sea. The foraging sites are primarily distributed along the coast of the continental shelf and affiliated islands of China, which further confirms the existence of migratory corridors for green turtles offshore of China. We suggest integrating and formulating marine national parks off the Beibu Gulf, Eastern Hainan, Guangdong, Fujian, Taiwan and Zhejiang Marine Nature Reserves, strengthening international and regional cooperation to protect the natal grounds, foraging grounds, migratory corridor, and other habitats of green turtles, to ensure effective protection of their life cycle.