On-line thermal width adjustment hydraulic control system for crystallizer

The utility model relates to an on-line thermal width adjustment hydraulic control system of a crystallizer. The on-line thermal width adjustment hydraulic control system comprises an oil supply leakage alarm device, a crystallizer narrow edge position control device, a crystallizer wide edge soft clamping force adjusting device, a narrow edge width adjustment hydraulic cylinder and a wide edge clamping force release hydraulic cylinder, the oil supply leakage alarm device is composed of a throttle valve, a one-way valve, a differential pressure transmitter, an electromagnetic valve and a filter. The four sets of crystallizer narrow edge position control devices control four sets of narrow edge width adjusting hydraulic cylinders at the upper and lower positions of narrow edges on the two sides of the crystallizer respectively; the crystallizer broadside soft clamping force adjusting device controls four sets of broadside clamping force releasing hydraulic cylinders at the upper part and the lower part of the