Die adjusting mechanism applied to press machine and press machine thereof

The utility model relates to the technical field of machinery, in particular to a die adjusting mechanism applied to a press machine, which comprises a die adjusting fixing frame and a die adjusting main body arranged in the die adjusting fixing frame, and the die adjusting main body comprises a sliding block cover plate penetrating through the die adjusting fixing frame and a spline shaft driven by a driving mechanism to rotate. The large adjusting gear is in insection connection with the small adjusting gear arranged at one end of the spline shaft in a sleeving mode and arranged at the two ends of the small adjusting gear, the two sliding block connecting base structures are connected with the large adjusting gear through nuts in a one-to-one correspondence mode, and the sliding block is arranged on the mold adjusting fixing frame and driven by the two sliding block connecting base structures to do lifting motion. The nut sleeves the upper end part of a sliding block connecting seat of the sliding block con