The thumbnail fairing is in the pylon leading edge. As part of power plant system fairing, It provides the smooth aerodynamic configuration for pylon and engine. It also provides protection and space of lines for fuel, Hydraulic, electronic and Air Management System. The thumbnail faring should meet the bird strike requirement and should not impact the safety of aircraft after bird strike according to its position and function. Bird strike test is usually used for airworthiness confirmation. Bird strike analysis is usually used to reduce the number of test impact location in order to lower the cost and time. This paper introduces an analysis process and method of pylon thumbnail fairing bird strike, and validates this method by an engineering bird strike test. Finally a reliable thumbnail fairing bird strike analysis method was obtained, which could provide an example for aircraft fairing bird strike analysis.