Three-point fixed printing substrate levelness adjusting structure and method

The invention provides a three-point fixed printing substrate levelness adjusting structure and a method. The three-point fixed printing substrate levelness adjusting structure comprises a printing powder cylinder, a printing powder metal flat panel, a sliding rail, a sliding block, a dial indicator assembly, a powder paving scraper, a printing substrate, a printing moving plate and a three-pointfixed levelling assembly. The levelness of the printing substrate is adjusted through the three-point fixed levelling assembly; and the dial indicator assembly is slid along the sliding rail, the powder paving scraper is driven synchronously to slide, and accordingly, the levelness of the printing substrate is detected. The three-point fixed printing substrate levelness adjusting structure and themethod have the following advantages that (1) under the condition that the scraper is replaced or the printing substrate moves to a certain extent, the levelness of the printing substrate can be adjusted conveniently, fast an