Abstract: By exploring effects of hydrogen-rich water（HRW）on soil enzyme activities, as well as cowpeas growth, a reference was provided for HRW application in green and low-carbon vegetables cultivation．Experiment adopted a single-factor test to compare soil enzyme activities, seedling traits, plant traits, yield and output value, quality, resistance, and percent of infestation under HRW and general water．Results showed that activities of soil dehydrogenase, catalase, urease, and phosphatase in HRW were significantly higher than those in general water during cowpeas seedling stage, initial flowering stage, and harvesting stage．20 days after sowing, fresh weight of whole cowpea seedlings and roots fresh weight treated with HRW were significantly higher than those in general water．In HRW treatment shortened period from sowing to seeding emergence by 5 days, initial flowering stage by 7 days, harvesting stage by 6 days, and extended harvesting completion period by 9 days, with whole growth period by 9 days．Length of main stem, leaf length, and leaf width of cowpea treated with HRW were greater than those in general water．Length of cowpea pods treated with HRW increased by 11.88%, pods transverse diameter increased by 33.33%, a single pod weight increased by 22.65%, and yield and output value per hectare increased by 21.24%．Vitamin C content, soluble sugar content, soluble protein content, and fat content in HRW treatment were significantly higher than those in general water．Pesticides application frequency for diseases and insect pests in HRW treatment was significantly lower than general water．Disease indices for anthracnose, wilt disease, and other diseases, as well as damage rates caused by Etiella zinckenella and snails were significantly lower than those treated with general water．Agricultural residues in HRW treatment were lower than those in general water and both met standards．