Ultra-short pulse laser has broad development prospects in the field of glass welding due to its unique advantages of high processing accuracysmall heat affected zone and high efficiency. In practical scenariosglass often needs to enhance itself strength through strengthening to meet the reliability of its application. This article successfully realizes welding between chemically tempered glass using infrared ultra-short pulse laser. By observing the shape of welding spot with microscopethe regression equation of welding powerfrequencyspeed and laser welding joint size was summarizedand the accuracy of regression equation was verified. The results show that under the conditions of welding frequency 500 kHz and welding speed 10 mm/sas the welding power increasesthe mechanical strength of welding chemically tempered glass increases first and then decreases. The maximum shear stress of welding chemically tempered glass can reach 11.09 MPaand the maximum tensile stress can reach 7.10 MPa. During laser weldingthe chemically tempered glass is not only subjected to its own thermal expansion pressure but also superimposed tensile stressso it is easier to cause damage to surrounding area.