According to the analysis and testing results, structural improvement suggestions for the Hydraulic Swing-type plate shears QC12Y-4×2500 are given as follows.In addition to the throat fillet of frame and shear cylinder contact position of tool carrier, the mechanical properties of the structural material Q235 can meet the maximum force condition requirements, which means the plate shears has a certain range for weight reduction, for example the frame wallboard and tool carrier wing boards can be appropriate reduced.Aiming at reducing the stresses of the throat fillet and shear cylinder contact posit妬n of tool carrier, reinforcing plates can be welded to partly strengthen the two larger stress positions as shown in Fig. 8 and Fig. 9.