Abstract: With ANSYS software, the finite element anasysis of the integrated optical system based on tunable diode laser absorption spectroscopic technology(TDLAS) was built, numerical modal and harmonic response were analyzed. Based on the shaking table test result, the system structural dynamic properties, the amplitude-frequency curves under different dynamic loadings were measured in experiments. Then, combined with calculation results and test results, anti-vibration performance of optical system was analyzed, and frequency swing of environment vibration in which system can work was got. Result shows that system can work within 900 Hz environment vibration. It has the capability of testing and diagnosis outside the lab.