The utility model discloses a lifting adjusting device of a glass pressing machine. The lifting adjusting device comprises a frame of the glass pressing machine, wherein four lifters are arranged on the frame and located under two ends of each of a main roller and an auxiliary roller of the glass pressing machine, casings of the lifters below two ends of the main roller and casings of the lifters below two ends of the auxiliary roller are connected through couplings respectively, lead screw flanges are arranged at the top ends of lead screws of the four lifters, and the upper ends of the lead screw flanges are fixed with supporting seats where the main roller and the auxiliary roller are mounted. The lifting adjusting device is novel in structural design, gravity of each pressing roller and pressure of each upper pressing rod are directly transferred to the lead screws of the lifters, the probability of inclination of the rollers is avoided, the operation stability of the rollers is guaranteed, and the glass forming quality is guaranteed; lifting adjustment is more stable, the application range is wider, and guarantee is provided for large-roller-diameter and thin-glass development of the glass pressing machine.