Abstract: The fisheries biology characteristics of Argyrosomus argentatus, including the size composition, weight composition, relationship of body length and weight, sex ratio, gonadal maturity and feeding intensity were analyzed based on the data collected from August 2017 to April 2018 in Minnan-Taiwan Bank Fishing Ground. The results showed that the body length ranged between 45 and 202 mm, and the dominant standard length ranged between 120 and 150 mm occupied 48.4% of total samples. The body weight ranged between 2.0 and 219.0 mm, while the dominant weight group ranged between 40.0 and 70.0 g occupied 43.0% of total samples. The mean length and length distribution of each month both had significant differences (F=25.161, P<0.05). The relationship between standard length and body weight was fitted by the power exponential function W=2.560×10-5L2.971 7 (R2=0.983 8). The sex ratio was 2.16∶1. The dominanted gonad stage was maturity Ⅱ phase which took up 86.32%. Maturity at Ⅴ phase or above was not found. The feeding intensities were dominated by grade 0 and grade 1, which occupied 71.11% of total samples. The feeding intensity of each month also had significant differences (F=10.346, P<0.05). Only 16.1% of samples reached the minimum capture size, which reflected great damage to juveniles. Measures for the protection of reproductive stock and juveniles of A. argentatus should be taken in order to achieve continuous use of the resource.