The invention provides a drawing forming method for steel tilted tees. The method comprises the following steps: manufacturing a base with a groove; opening a hole on the tee-joint position of a tube blank; penetrating a pull rod in the hole; filling a hammer inside the tube blank; connecting the pull rod and the hammer together; putting the tube blank in the groove of the base; and drawing the pull rod and the hammer along a branch pipe of the tee joint by drawing equipment to form a tee-joint branch pipe, wherein the hammer is in an eccentric reverse conical shape, and the lateral profile of the hammer has an appearance of parabola, arc or Archimedes spiral with continuously-changed curvature. Welding on the end surface of the branch pipe can increase the length of the branch pipe, weld joints are on the same plane in welding, so that the welding quality can be easily controlled. Plastic formation of the tilted tees is performed by adopting tube blank drawing flanging process, so the tilted tees has strong adaptability, simple technical process, simple equipment, good formed quality and high strength; and the method can greatly improve the manufacture efficiency of the tilted tees, and reduce the manufacture cost.