In response to the complicated measurement environment of the aircraft hydraulic pipes, and the problem of the difficult layout of the sensors of the traditional wired measuring equipment, this article proposes a new kind of strain measuring device for hydraulic pipes. Based on the frequency response function method, dynamical models of the pipe and the measuring device are established to study the mapping relationship between their strains. The device is detachable and specifically designed for realizing non-contact measurement of the pipe′s strain. Combined with theoretical calculation and finite element simulation, this work studies the measuring device′s influence on the mode and strain of the pip and optimizes the design of the measuring device including size parameters. The accuracy of finite element simulation and the effectiveness of the non-contact measurement method are evaluated by experiments whose results show that the influence of the measuring device on the pipe is weak, with a 6. 2% relative average deviation of strain reconstruction below 300 Hz. The method and device are expected to solve problems for rapid and accurate measurement of the hydraulic pipe strain in the aircraft under complicated measurement environments.