The utility model belongs to pipe processing technique without cutting. The hydraulic automatic machine for drawing pipes with unequal wall thickness provided by the utility model is composed of a hopper, a press head, a core rod, a feed movement part, a drawing movement part, etc. The width of the hopper is adjustable. A material stopping controller is arranged on a material channel, and the two-lobe type cruciform press head is arranged on a material stopping position on the middle part of the material channel. The core rod is controlled by a transposition oil cylinder and can rotated 90 DEG to feed an already pressed material section into a drawing die. The drawing movement part of the utility model is composed of a hydraulic clamp and a drawing oil cylinder which are mutually hinged. A hydraulic part of the utility model is controlled by a PC microcomputer. The utility model can draw a pipe with changeable wall thickness which is thick on both ends and thin in middle part.