The invention discloses a preparation that can improve fruit coloring of Nanguo pear, in particular relates to a water preparation specially used for Nanguo pear. The component and concentration of the preparation are 1g / L of sucrose, 1g / L of monopotassium phosphate, 0.1g / L of abscisic acid, 0.2g / L of threonine, 0.2g / L of serine, 0.8g / L of glutamic acid, 0.22g / L of phenylalanine, 0.1g / L of levulinate, 0.6g / L of boracic acid, 100 1ml / L of tween. The preparation method is as below: step one, adding said sucrose, monopotassium phosphate, abscisic acid, threonine, serine, glutamic acid, phenylalanine, levulinate, boracic acid, tween 100 according to proportion; step two, dissolving the medicines in water (wherein, dissolving the abscisic acid by ethanol, dissolving threonine, serine, glutamic acid and phenylalanine by 100 DEG.C distilled water, dissolving monopotassium phosphate by 50-70 DEG.C distilled water), mixing after the mixture is diluted, and adding water to obtain a required concentration, mixing evenly; thus, the preparation is obtained. The red-coloring rate of Nanguo pear can be improved by more than 13% by using the preparation. The preparation can be applied conveniently, require a shorter time. The preparation has no pesticide damage and has no side effect to human body or environment.