Abstract: Uses the module FLOTRAN CFD for hydrodynamic computation in the software ANSYS that is versatile to finite element analysis to model and analyze the flow field of the submerged circulative reactor to impinging streams (SCISR). The computation results showed that all the parameters in the flow field are symmetrical to the planes impinged. It was found that there are still dead zones on upper and lower sides of conversion barrel and in impinging zone, but they can be reduced by increasing Reynolds number. In the impinging zone the velocity isolines are intensive, ie., in the zone there is a great velocity gradient which is very beneficial to mix up turbulent motions. A pressure value acquisition device on computer is applied to conduct pressure testing for the flow field and the pressure values measured are compared to that modeled, with a good compliance shown.