Rack cutting method and rack lifting device

The invention discloses a rack cutting method and a rack lifting device and belongs to the field of lifting devices. The cutting method comprises the following steps: according to kerf width a obtained through cutting of a cutting torch and parameter information of a basic rack, the first track radius r and the second track radius R of movement of the cutting torch are determined, and the parameter information comprises addendum Ha, dedendum Hf and the bottom clearance of the basic rack; and according to the parameter information, the first track radius r and the second track radius R, the cutting torch is controlled to move, thus a first rack and a second rack are obtained through cutting with a kerf obtained through one-time movement of the cutting torch, and both the tooth shape of the first rack and the tooth shape of the second rack are the same as that of the basic rack. By adoption of the rack cutting method and the rack lifting device, the rack machining efficiency is improved. 本发明公开了种齿条切割方法及齿条升降装置，属于