The globe valve is commonly used in industrial system,it is easy to overlook the internal flow characteristics in the valve design,and lead to unnecessary energy consumption.By model the structure of a typical high-pressure globe valve,The internal flow field,w ith the CFD softw are to.The analysis results show that;closing the flow coefficient of the valve w ith the valve opening height first increases,reaches a certain value,the declining trend;valve flap fillet size change of the flow coefficient is smaller,there is an optimal value.