[Objectives] The influence of propeller geometrical parameters on the forward and backward hydrodynamic performance of the propeller is studied by numerical simulation. [Methods] By taking a 33000DWT oil product tanker as the application object, the hydrodynamic performance of one chart propeller and three theoretical propellers under forward and backward conditions are simulated by using RANS method combined with Realizable k-ε turbulence model. The influence of lift distribution coefficient, pitch and camber combination on propeller’s forward and backward hydrodynamic performance are discussed through comparison. [Results] The results show that under the forward and backward conditions, the pitch of the blade will generate positive lift, whereas the camber of the blade will generate positive and negative lift alternately. Properly increasing the camber and reducing the pitch of the propeller in the design of the propeller is beneficial to improve the open water efficiency under the forward conditions. On the contrary, adopting the combination of a large pitch and a small camber is beneficial to increase the reverse thrust. [Conclusion] Based on the research results, several suggestions are given to weight both the forward and backward performance of the propeller in the design of the propeller.