Based on 113 Dosidicus gigas specimens collected from the sea of Peru, the microstructure of eye lens is analyzed and the periodicity of the formation of growth increments is validated. Results shows that eye lens consists of two halves:the front and back. The plane with the largest diameter is the equatorial plane, records all growth increments of lens. Eye lens is composed of hood and crest, in which light-dark alternated concentric growth increments are distinct. From the core to the edge of the eye lens, the spacing between adjacent growth increments gradually decreased and there is no obvious transition zone.The average diameter of the eye lens is 7 mm, and the average daily growth of 7 increments. Through paired sample t test, it was found that there was a significant difference between the increments of eye lens and statolith-determined age (P<0.05). The lens growth increments A of the sample showed an exponential relationship with the lens diameter D, (D=6.88e^{0.000 09A},n=113,R²=0.578 1) and also had an exponential relationship with the mantle length ML (L_ML=216.25e^{0.000 2A}, n=113, R²=0.463 2). Although the results of the study negate the possibility of a daily periodical pattern of lens increments of the D.gigas, it can be regarded as individual growth analysis indicators, at the same time and it provides important basic literature for Chinese scholars to study the age growth of cephalopods.