Ultra-thin high-aluminum-silicate glass was taken as the research object, and the surface compressive stress, microhardness, impact strength and ion exchange depth of the glass samples before and after ion exchange were tested systematically. The experimental results show that the surface compressive stress of glass was increased from 83.4 MPa to 925.3 MPa, the microhardness was increased from 657.5 to 875.1, the test height of falling ball was increased from 18.3 cm to 45.7 cm, and the diffusion depth of K+ increased from 27 μm obtained by one-step ion exchange to 44 μm obtained by two-step ion exchange.