The pipe shrinking machine is a hydraulic automatic pipe end processing machine to shrink the end of the pipe under normal conditions. The replacement of the mold can shrink, bulge, and upset the pipe. The pipe ends such as ribs are processed and formed, and can be freely determined according to user needs. Manual, inching or automatic processing. The machine is composed of oil tank, bed, slider, main cylinder, mold core rod (optional), limit cylinder, and compression cylinder, Clamping mold, axial positioning cylinder, axial positioning angle iron and other main parts.