Hydraulic drive plate of roll grinder and using method of hydraulic drive plate

The invention discloses a hydraulic drive plate of a roll grinder and a using method of the hydraulic drive plate, and belongs to the technical field of hydraulic drive plates. The hydraulic drive plate comprises a metal cylinder, a hydraulic rod is arranged in the metal cylinder, a workpiece clamping assembly is arranged at one end of the hydraulic rod, and a reinforcing positioning assembly is arranged on the surface of the end, away from the workpiece clamping assembly, of the metal cylinder; a lifting hook clamping assembly is arranged at the upper end of the metal cylinder, a first protective shell is arranged on one side of the metal cylinder, a second protective shell is arranged on the other side of the metal cylinder, and a positioning splicing assembly is arranged between the first protective shell and the second protective shell. Through the arrangement of the positioning splicing assembly, the protection shells can be conveniently positioned and spliced, the convenience of installation of the prot