VITA MARK II, a commonly used dental glass ceramic material, is typically milled using a 5-W infrared femtosecond laser. The effects of ultra-fast laser process parameters on milling efficiency and milling effects are systematically studied, and the 20-W infrared femtosecond laser prepared for future test prototype is estimated using the experimental results of 5-W infrared femtosecond laser. The experimental results show that the milling efficiency of the 5-W infrared femtosecond laser on VITA MARK II ceramics is 0.0409 mm ³/s when the laser repetition frequency is 100 kHz, the scanning speed is 200 mm/s, and the scanning interval is 0.01 mm. The roughness of VITA MARK II ceramics treated by femtosecond laser is ranged within 3--5 μm, the margin gap is approximately 50 μm, and the slope quantity is within 100 μm. The laser cutting threshold of VITA MARK II dental glass ceramics is 0.72 J/cm ². It is estimated that the milling efficiency of 20-W infrared femtosecond laser on VITA MARK II ceramics would be 0.1558 mm ³/s. Therefore, this experiment demonstrates the feasibility and effectiveness of laser cutting dental glass ceramics, providing a reference for the construction of the test prototype.