The invention provides a textile machine mechanical failure positioning system which comprises a vibration frequency catcher, a frequency separation module, a power supply relay, an alarm module, a main control module, and a data storage module. The vibration frequency catcher is connected with the main control module through the frequency separation module. The power supply relay, the alarm module and the data storage module are directly connected with the main control module. The textile machine mechanical failure positioning system is capable of judging whether the textile machine is out of function by detecting whether the amplitude of vibration frequency of the textile machine is within an ordinary range, cutting off the power supply of a relevant facility using an electronic device, and avoiding further expansion of the failure.