Abstract: Fruit yield, total sugar, and calorific value were chosen to study energy potential of Polygonum viviparum, in Hongyuan, Ruoergai and Songpan. The results showed that, 1) Fruit yield and total sugar, differed significantly in 7 plots (P<0.001), with levels in plot 3 significantly higher than in the other samples (fresh weight 117.222 g/m², dry weight 46.226 g/m²). The highest total sugar was in plot 5 (54.16%), and the average was 49.73%. The calorific value of fruits in plots 2, 3 and 7 did not show regularity: the average was 15.85 MJ/kg. 2) Correlation analysis showed that fruit dry weight had a significant negative correlation with altitude, but a significant (P<0.05) positive correlation with coverage of P. viviparum and aboveground litter storage, while the impact of various factors on total sugar was not significant. 3) Statistics for the grassland areas showed the fruit annual yield in Hongyuan is from 17 387.81 to 105 674.34 t (fresh weight), in Ruoergai it is from 15 172.04 to 92 208.01 t (fresh weight). The annual total sugar in Hongyuan is from 8 646.96 to 52 551.85 t, in Ruoergai it is from 7 545.06 to 45 855.04 t, P. viviparum is expected to become a potential wild carbohydrate energy plant.