Abstract:  Vibration analyze the reason of small bore pipe of reciprocating compressor skid. The three-dimensional model of small bore pipe in the reciprocating compressor is established by Solidworks. The vibration mode finite element analysis of small bore pipe model is carried out by ANSYS Workbench software, and the vibration frequency and mode of small bore pipe under different reinforcement modes are compared and analyzed. The analysis results show that the stiffness of small bore pipe attachment has a great influence on the vibration performance. In order to avoid the resonance of small bore pipe, in addition to strengthening the main pipe support, the small bore pipe needs to be reinforced.