The current study analyzed the aggregation of Solenocera crassicornis in the sea area northeast of Fujian based on the pattern intensity index of the negative binomial parameter, mean crowding, and poly block index and discussed the driving factors of population aggregation. Results revealed that the aggregation intensity and mean crowding were high and the population was mainly concentrated in small reunion plaques with a season-specific pattern. In spring, the population primarily consisted of a single patch with stronger aggregation intensity and the lowest mean crowding than that in the other seasons. In summer, the population primarily consisted of four patches with weaker aggregation intensity and higher mean crowding than those in the other seasons. In the fall, the population primarily consisted of seven patches with the weakest aggregation intensity and higher mean crowding than that in the other seasons. In winter, the population primarily consisted of a single large patch with the strongest aggregation intensity and the highest mean crowding. The population spread with increased individual growth rates. Zooplankton biomass (diet) and bottom water temperature were the major factors affecting aggregation intensity of S. Crassicornis.