Abstract: The PVT analysis and separator numerical simulation experiment are carried out in combination with the abnormally low production of condensate oil in the gas reservoir of Pu76 fault block in Zhongyuan Oilfield. The surface separation conditions of high condensate oil and gas reservoir in Pu76 fault block are optimized. The PVT test indicates that this block belongings to a high condensate oil and gas reservoir for the condensate oil content of 523 g/m³. Numerical simulation experiments under different temperatures, pressures and separation stages are carried out after fitting the experimental parameters. The results shows that in the two-stage separation mode, the recovery of condensate is effectively improved by increasing the pressure of the first-stage separator, and the output of condensate can be reached from the current 15.0 t/d to about 25.1 t/d. Under the three-stage separation mode, it can be increased to 26.1 t/d, which is 4% higher than the two-stage mode.