Chitosan oligosaccharide regulator for promoting photosynthesis and growth of wheat

The invention belongs to the field of growth regulator, and relates to an application of chitoheptaose heptahydrochloride in the field of wheat growth regulation, in particular to chitosan oligosaccharide regulator for promoting photosynthesis and growth of wheat. The regulator is composed of chitosan oligosaccharide, surfactant and water. The concentration of the chitosan oligosaccharide in the regulator is 10 mg/L to 100 mg/L. A use method of the regulator for growth and photosynthesis comprises the steps that wheat seeds or plants are treated through the regulator in a seed soaking or spraying mode, and the plants are treated at the seed germination stage and/or the seedling stage. The regulator is simple and clear in component, raw materials are easy to obtain, the effect is remarkable, and environment friendliness is achieved.