Multi-direction pressure measurement in aero-engine inner flow field can provide important data support for aero-engine compression ratio calculation. In this paper, aiming at the problem that the existing porous probe combining with electrical pressure measurement method has the disadvantages of hysteresis and low measurement accuracy. Combining with the advantages of porous probe and optical fiber sensing technology, an integrated optical fiber probe for multi-direction pressure measurement of aero-engine internal flow is designed. The principle of multi-direction pressure conduction and pressure measurement of integrated probe is analyzed. FLUENT software is used to analyze the multi-direction airflow conduction performance and optimize the structural parameters of porous airflow conduction. A 5-hole integrated optical fiber probe was developed and the pressure measurement experiment was carried out. The results show that the average sensitivity of the multi-direction pressure sensors of the integrated probe is - 16. 267 μm/ MPa and the repeatability error is less than 2. 98% in the pressure range of 0. 7 ~ 1. 6 MPa. The maximum error of pressure measurement of various sensors is less than 1. 72% .