Hot-feeding method for medium-thickness plate blank

The invention relates to a hot-feeding method for a medium-thickness plate blank. The method comprises the following specific steps that A, a detector tracks the operation and the position of the plate blank; B, the detector judges whether the plate blank enters the operating range of an aligning device or not; C, the plate blank is aligned by the aligning device; D, the detector judges whether the plate blank enters the operating range of a flame cutter or not; E, the length of the plate blank is measured and collated through a laser measuring system equipped on the flame cutter; F, accordingto the length, given by the system, of sub-plate blanks, the length tolerance of the plate blank with the qualified length is evenly distributed to each sub-plate blank, and then a cutting trolley ofthe flame cutter performs secondary cutting on the plate blank under the guidance of a laser measuring device; G, the detector judges whether the plate blank enters the operating range of a number spraying machine or not; H,