Method for improving fruit quality of Crimson seedless grapes

The invention discloses a method for improving the fruit quality of Crimson seedless grapes. The method specifically comprises the following steps: (1) in a germination stage, applying at least one of fertilizers of Moerhou, Haisilijia and Tuzhidao; (2) from 5 days before flowering to an early flowering period, only reserving 6-10cm parts of spica tips, and thinning off other spica parts; (3) when young sprouts grow to have 4-5 leaves and inflorescences are exposed, spraying a resistance inducer diluent on leaf surfaces; (4) in the initial stage of fruit expansion, spraying a Hongtidabao diluent and/or a Baomeiling diluent to the clusters; and (5) in the initial stage of fruit coloring, spraying at least one of a polyglutamic acid solution, an abscisic acid solution and a brassin solution on the leaf surfaces. According to the invention, the water-soluble fertilizers increase soil nutrients and improve crop quality; by means of spica shaping, the fruit clusters can be promoted to be compact and tidy and consi