Abstract: Age structure, growth rate and growth model are the important research content of fishery biology. Based on the growth increments of squid statolith, the age structure, growth rate and growth model of Sthenoteuthis oualaniensis were studied in the Eastern Indian Ocean in autumn. The result showed that the S. oualaniensis age ranged 40-99 d in the medium form, and the S. oualaniensis age ranged 40-79 d in the dwarf form in the Eastern Indian Sea. The medium form S. oualaniensis age was greater than the dwarf form, and the female S. oualaniensis age was greater than the male. The S. oualaniensis age was lower in the equatorial seas, and the squid age was higher in higher latitude area. The S. oualaniensis mantle length absolute growth rate ranged 0.39-2.16 mm/d, and the instantaneous growth rate ranged 0.35%-1.78%. The S. oualaniensis body weight absolute growth rate ranged 0.54-7.70 g/d, and the instantaneous growth rate ranged 1.20%-5.20%. The S. oualaniensis mantle length and body weight absolute growth rate increased with the increase of age. The female S. oualaniensis growth rates were higher than the male S. oualaniensis. The growth models were fitted with age and mantle length data, and the Akaike’s information criterion (AIC) values of each model were calculated. The minimum AIC value was liner model in total, power function model in the medium form male S. oualaniensis, liner model in the medium form female S. oualaniensis, power function in the dwarf form male S. oualaniensis, index model in the dwarf form female S. oualaniensis. In this study, the female S. oualaniensis was greater than male S. oualaniensis and the medium form was greater than the dwarf form in mantle length, age and growth, in the eastern Indian Ocean.