A 120-day feeding trial was conducted to investigate the growth regularity of Siniperca chuatsi in a land-based recirculating aquaculture system（RAS）. Healthy juvenile with an initial average body weight of（49.84±7.10）g and an initial average body length of（13.11±0.68）cm were stocked as the research objects at a density of 98 individuals per cubic meter（ind·m⁻³）.With a 30-day interval as one sampling period, the experiment was divided into four stages: stageⅠ（Days 1～30）, stageⅡ（Days 31～60）, stage Ⅲ（Days 61～90）, and stage Ⅳ（Days 91～120）. Body weight and body length were monitored and statistically analyzed at each stage. The results showed that after 120 days of culture, the final average body weight was（255.71±57.89）g, the final average body length was（22.05±1.78）cm, the survival rate was（93.70±2.58）%, and the feed conversion ratio was（1.19±0.02）.Both body weight and body length increased significantly with the progression of the culture stage（P＜0.05）, and their relationships with breeding days both fitted by quadratic models,and the fitting equations were as follows:y= −5.8293x²+88.141x−36.574

（R²=0.9948）for body weight, and y= −0.4557x²+5.0083x+8.454（R²=0.9981）for body length. The relationship between body weight and body length conformed to power function models,and the fitting equation was y=0.0199x^3.0544（R²=0.986）.The growth performance of Siniperca chuatsi showed distinct stage-specific differences. The weight gain rate, specific growth rate of weight, length growth rate, and specific growth rate of length were the highest in stage I and the lowest in stage Ⅳ,with significant differences among stages（P＜0.05）.The body weight growth rate was the fastest in stage II, with a daily weight gain of（2.43±0.06）g. The body length growth rate was the fastest in stage I and stage II, with a daily growth of（0.10±0.01）cm in both stages. In conclusion, under the land-based RAS,the growth of Siniperca chuatsi exhibits an obvious phased pattern.For practical production, precisely identifying the inflection point of growth decline and implementing pond-separated management accordingly are key technical measures to optimize the aquaculture process, shorten the culture cycle,and improve aquaculture efficiency.