Method for setting segment roll gaps before continuously cast steel on basis of pressure feedback

The invention relates to a method for setting segment roll gaps before continuously cast steel on the basis of pressure feedback and belongs to the technical field of metallurgy continuous casting control. The method includes: placing cushion sheets between an upper frame and a lower frame of a segment, calculating difference value between set cast-on roll gap value and practically detected mechanical roll gap value of the segment to convert an upper frame offset value and controlling the upper frame to move vertically; inputting pressure feedback values detected by a pressure sensor into a segment roll gap setting computer system, and judging the cast-on roll gap value of current moment is accurate or not according to the pressure feedback values; calculating the to-be-increased or reduced thickness of the cushion sheets between the upper frame and the lower frame of the segment, and increasing or decreasing the cushion sheets by operators on site, completing fine tuning operation and obtaining accurate segment cast-on roll gap values. By the method for setting segment roll gaps before continuously cast steel on the basis of pressure feedback, affection on the cast-on roll gaps from deformation of the connecting rod and abrasion of a working roll is sufficiently considered, and accuracy of cast-on roll gaps is guaranteed.