Abstract: Based on the soil analysis, effects of interplantation on soil fertility of yong rubber plantation were studied. The main research results were as follows: by interplantation with sugarcane in young rubber plantation, soil fertility and pH value decreased to some extent; interplantation with pineapple and banana, soil fertility was increased to some extent. The effect of soil pH value was improved by intercropping pineapple, but intercropping banana was opposite. Both pH value ranging are suitable for rubber tree growth. Comprehensive analysis showed that the intercropping of banana best, pineapple was followed and sugarcane was the worst.