According to the stratified sampling survey data of fishery production from fishing ports along the northern South China Sea from 2008 to 2020, the biomass of P.anomala was assessed. The production of P.anomala mainly consisted of trawl net and gill net, accounting for 40.52% and 53.14% of the total catch, respectively. Twelve CPUE data were analyzed by surplus production models. The maximum sustainable yield was 47 402.96 tons inferred by equilibrium Schaefer model. The maximum sustainable yield was 36 739.93 tons inferred by equilibrium Fox model. The maximum sustainable yield was 29 198.74 tons inferred by non-equilibrium Schaefer model. Fishing effort exceeded the maximum sustainable level in double trawl with mainpower above 400 kW, single trawl with mainpower of 100~200 kW and gillnet with mainpower below 50 kW. Overfishing did not occur, and the utilization level was not beyond the optimum level in other fishing methods and mainpower segment. The total allowable catch of P.anomala is comprehensively set within 28~32 thousand tons in the northern South China Sea at present.