Abstract: To realize the ecological control of orchard weeds and reduce or avoid the use of chemical herbicides, this study designed two ecological control techniques of white clover and red clover according to the niche estimation and niche competition principle, used clean tillage as the CK, the population quantity, biomass and average height of the orchard weeds were investigated by small samples for two consecutive years. The results showed that there were 34 species of 28 genera and 13 families in the orchards. The Pi of control weeds were 1.001 and 1.000, that of white clover were 0.755, 0.664, 1.001 and 0.945, respectively, and that of red clover were 0.986, 0.889, 0.982 and 0.992, respectively. The species richness (S) and population diversity (H) of white clover were higher than that of control, and the evenness (J) was less than that of control in the first survey, the dominant concentration index (C) was all lower than that of CK. The total numbers of weed of red clover was lower than that of control. This study showed that white clover could change the weed community structure of the orchard, and effectively control the growth of weeds.