The swordtip squid is one of the important economic squid resources in the East China Sea. Studying the composition, age, and growth pattern of its spawning population is the basis for understanding its life history. Based on the samples of the East China Sea swordtip squid collected from the trawl nets in September and February of 2017 and 2018, this study used the age information of otoliths to study the sex and year differences in population composition and growth patterns. The results showed that there were differences in population mantle length and body weight composition between years, but there was no significant difference between genders (P> 0.05). It was found by reading the age of otoliths and performing inverse calculation that the two-year dominant day-age group was 190-220d, and there were significant differences in age composition of male during the year (P <0.05). The inverse calculation results showed that the peak hatching period was from March to May and August. The spring and summer spawning groups are the dominant hatching groups. The mantle length and body weight growth of the spawning group in spring were best fitted with a logistic curve, and the spawning group in summer were best fitted with a Von-Bertanffy and a logistic curve. In 180-270d, the mantle length and body weight growth rate of spring spawning group was faster than that of summer spawning group. After 240d, the male mantle growth rate was faster than that of female, and the body weight growth rate was slower than that of female. The age of the 50% maturity of the spawning population in spring is younger than that of the summer spawning group, and male individual is younger than the female. According to comprehensive analysis, the growth differences of different spawning groups may be related to the environmental factors and growth mechanisms of the habitated sea areas. Therefore, Reveal the age and growth of the population through the otolith age information, and provide basic data for a comprehensive understanding of the life history characteristics of the swordtip squid.