Abstract: Several surface processing methods based on the abrasive flow were developed, taking advantage of wall effect between abrasives and processing surface to form the micro cutting, the surface machining was realized. A feasible finite element model was developed adopting ANSYS for the former processor. The abrasive flow was mainly used to process ductile material, such as metal and alloy. Take typical material of Ti-6Al-4V as target, Johnson-Cook elastic-plastic material model was established. Material failure process could be observed. The calculation results accord with Hashish model, the micro cutting was more obvious when abrasive particle impacting wall with certain injection angle. Wear increases with the impact speed increasing, and wear rate increases with impact numbers and particle diameter(<200μm) increasing.