Abstract: Through methods of orthogonal test,welding parameters of rotary axis ultrasonic welding were studied. The test value of each welding parameter was measured by instruments,and the bonding force of non-woven fabric welding pattern was taken as the welding quality index.By means of range method and variance method,the influence of welding parameters on welding quality was analyzed and the optimal welding parameters were obtained. The results indicated that the welding amplitude had the most significant effect on the bonding quality of welding patterns in non-woven fabric,and the optimal welding parameters were 31. 85 r/min of rotary axis speed,0. 3 MPa of welding pressure and 48 μm of welding amplitude.