This article proposes and designs a four-nozzle ejector with different nesting methods to meet the variable flow requirements of proton exchange membrane fuel cell full power hydrogen recirculation under different working conditions. The computational fluid dynamics method is used to study the internal flow field of the different nesting type four-nozzle ejectors and recycling performance. The results show that the internal flow field of partially nested ejector is more stable than that of the fully nested ejector. When the secondary flow pressure and back pressure remain constant, the entrainment ratio (ER) of partial nested ejector firstly rises and then decreases with the condition of the primary flow pressure increasing from 6 bar(1 bar = 100 kPa) to 10 bar where the maximum ER is obtained at the primary flow of 7 bar. Through the comparison with the experimental data, the partial nested ejector has better performance than the fully nested ejector whose performance of ER declines gradually in the whole process. Finally, the full power variable flow linear regulation performance is realized through the multi-nozzle logic control to meet the requirements of fuel cell variable power operation for the hydrogen cycle ejector.