In order to provide theoretical basis for type section and design of aquaculture ponds, computational fluid dynamics (CFD) simulation analysis of velocity flow field is conducted for two classical dual-channel circular aquaculture ponds – Cornell and Waterline under the conditions of the same body size, water flooding velocity and water yielding ratio at the bottom of the ponds. Fluent module of Ansys 15.0 software is applied to simulation, RNG k-ε turbulence model is applied to numerical simulation of velocity flow fields inside the two ponds, and characteristics of the flow fields are analyzed and compared. The results show that the water velocity in the two ponds increases sharply with reduction of the radial distance in a short distance towards the center, reaches the maximum at certain radial distance, and then decreases with reduction of the radial distance before reaching the minimum in the central axis of the ponds or nearby; longitudinally, the water velocity decreases with increase of the height at the same horizontal distance to the center; when water yielding ratio at the bottom of the ponds is below 10%, both the bottom self-cleaning capacity and the overall flow field uniformity of Cornell are worse than Waterline. The results also verify that the empirical design value of water yielding ratio at the bottom of the two ponds is above 10% theoretically.