Japanese Spanish mackerel () is a large pelagic species that widely distributes in the Bohai Sea, the Yellow Sea, and the East China Sea. Xiangshan Bay is one of the most important spawning grounds of . In each year, the spawning stocks swim into Xiangshan Bay and prepare to spawn in early April. In this study, we analyzed the temporal and spatial distribution of fish eggs, larvae, and juveniles of in Xiangshan Bay to test their relationships with surface temperature, salinity, and depth. Ultimately, an understanding of the characteristics of the spawning and nursery grounds is essential for resource protection and sustainable utilization. Fourteen sampling stations were established, and eggs, larvae, and juveniles of were collected using small plankton trawls (1 m×2 m, 1.0 mm mesh size) each week from April 3rd to June 3rd in 2015. The temperature, salinity, and depth at each sampling site were also measured at each sampling time. The results showed that spawned in Xiangshan Bay from early April to early June, with peak spawning from mid-April to early May. Larvae and juveniles appeared later than eggs, but were only present for a short time. The abundance of larvae and juveniles was high from early May to mid-May. Eggs, larvae and juveniles of were mainly distributed in the outside and middle area of the bay. The distributions of eggs, yolk-sac larvae, and preflexion larvae of were similar, and mainly concentrated in the deeper waters. The distributions of postflexion larvae and juveniles of were similar, and their densities were relatively high in shallow waters. Temperature, salinity, and depth were significantly related to the abundance of eggs. Depth was positively related to the abundance of eggs ( tend to spawn in the profundal zone (15-30 m) of Xiangshan Bay. The results showed that surface temperatures of 15-19℃ were suitable for the incubation of , and the optimum surface salinity for eggs was 25.5-26.0. The abundance of larvae and juveniles was significantly related to surface temperature, but not to surface salinity and depth. The optimum surface temperature for larvae and juveniles was 18-19℃.