Hydraulic control system and control method for core rod supporting frame adjusting device

The invention discloses a hydraulic control system and method for a mandrel supporting frame adjusting device. The system comprises a pressure reducing valve, a first hydraulic control one-way valve, a second hydraulic control one-way valve, a third hydraulic control one-way valve, a two-position four-way electromagnetic reversing valve, a three-position four-way high-frequency-response proportional reversing valve, an adjusting hydraulic cylinder and an opening hydraulic cylinder. According to the core rod carrier roller opening and closing device, the rodless cavity of the adjusting hydraulic cylinder is filled with hydraulic oil, so that when the opening hydraulic cylinder acts on the piston rod of the adjusting hydraulic cylinder, the hydraulic oil in the rodless cavity can serve as a hydraulic spring to absorb impact, and transient acting force generated when the core rod carrier roller is opened and closed can be buffered; the core rod supporting frame adjusting device effectively solves the problem tha