To solve the problem of multi-phase measurement in oil production, a high-precision and high-sensitivity detection instrument for multi-parameter measurement of petroleum production is designed and developed, which is based on the innovative fiber-conductance combined probe developed by the research group. The ZEMAX ray tracing method and the FEM numerical analysis method are both used to theoretically analyze the electric field distribution and response characteristics of the fiber-conductance combined probe array multiphase logging tool. It has been verified that a good measurement effect can be realized under working conditions such as flow rate of 5, 10, 20, 30 m 3 / d, gas holdup of 10% , 20% , 30% , 40% , and water holdup of 90% , 80% , 70% , 60% , etc. To further prove its excellent performance, the multiphase flow conditions are considered, such as liquid flow rate 30 m 3 / d, the liquid phase water holdup 25% , 45% , 65% and 85% , and the gas flow rate 6, 12, 24 m 3 / d, etc. The dynamic experimental analysis is carried out. The measurement error of FCCPA_MLT gas holdup is within 5% , and the water holdup error is within 10% . The actual dynamic experiment and the simulation results remain the same. Results show that the developed fiber-conductance combined probe array multi-phase logging tool has good performance.