In order to explore the growth regularity of Siniperca chuatsi under the land-based recirculating aquaculture mode, the healthy Siniperca chuatsi 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 used as the research objects. According to the seedling density of 98 individuals per cubic meter (ind·m⁻³), a 120-day feeding trial was conducted in the land-based circulating water system (RAS). With a 30-day interval as one sampling period, the experiment was divided into four stages: stageⅠ (Days 1−30), stage Ⅱ (Days 31−60), stage Ⅲ (Days 61−90), and stage Ⅳ (Days 91−120). The 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 of Siniperca chuatsi 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 the body weight and body length increased significantly with the progression of the culture stage (P＜0.05), and their relationships with the breeding days were both consistent with the quadratic function model. The fitting equations were respectively 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 the 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 body weight gain rate, specific growth rate of body weight, body length growth rate, and specific growth rate of body length were the highest in stage I and the lowest in stage Ⅳ, with significant differences among the 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 exhibited an obvious phased pattern. For the practical production, precisely identifying the inflection point of its growth rate and implementing the pond-separated management accordingly were the key technical measures to optimize the aquaculture process, shorten the culture cycle,and improve the aquaculture efficiency.