Abstract: Vibration comfort is one of the important indexes to evaluate the running quality of vehicles.ISO 2631 standard, which is used to evaluate the sensitivity of human body to vibration frequency, has been widely used. With the help of all kinds of sensors embedded in Android phones, this article designed the digital filter of ISO2631 standard, and developed the application software of ISO2631 comfort meter for rail vehicle based on Android System. The software has the functions of data acquisition and processing, data real-time display, data selective storage. The program test results show that the measurement deviation of the meter is less than 15%, which can implement the simple evaluation of vehicle comfort, and has the characteristics of portable and universal.