Device capable of continuously adjusting cushion block roll gap of slab caster

The utility model relates to a device capable of continuously adjusting a cushion block roll gap of a slab caster. The device comprises an upper adjusting ring and a lower adjusting ring, the upper adjusting ring and the lower adjusting ring are respectively provided with a spiral face with a fixed spiral angle, when the upper adjusting ring and the lower adjusting ring are combined together, a thread pair is formed, and the total thickness of the upper adjusting ring and the lower adjusting ring is continuously increased or decreased through the rotating motion of the upper adjusting ring andthe lower adjusting ring. Continuous adjustment of the cushion block roll gap X (namely the assigned roll gap) is achieved by rotating the upper adjusting ring through the centrosymmetric screw pair,and compared with the mode that bolts need to be assembled and disassembled to increase or decrease gaskets when gaskets are increased or decreased to adjust the cushion block roll gap value X, the labor intensity is high, an