Abstract: Severe vibration frequently happens on diamond circular saw blade during the cutting process.The stochastic finite-element method is applied to analyze diamond circular saw blade,and the Monte-Carlo probability designed method to study the reliability and sensitivity by conducting cycle sampling of ϕ350 mm diamond circular saw blade for 1000 times.The study states that the unreliability increases with the threshold value rising,and that the vibration sensitivity is greatly affected by the thickness of corresponding diamond circular saw blade.The result will play an essential role in optimizing the structure,prolonging the service life and enhancing saw cutting quality of the diamond circular saw blade.