The effects of honeysuckles with different ages on soil erosion on gneiss slopes were studied using artificial rainfall simulation. Results showed that planting honeysuckle significantly reduced soil erosion by rain water on gneiss slopes. Honeysuckle delayed initial runoff time, reduced runoff modulus and sediment transport modulus. Moreover, the effects increased with the increasing ages of the honeysuckles. Compared with bare soil, the one-, three-and six-year-old honeysuckles delayed runoff time by 0.71%, 23.33% and 39.20% respectively; the six-year honeysuckles reduced runoff modulus and runoff depth by 75% and 51%, respectively, and reduced sediment transport modulus by 23.42%~57.60%. Honeysuckle also improved soil erosion resistance. Compared with bare soil, the WAS_0.25 of the one-, three-and six-year-old honeysuckles on slopes increased by 11.52%, 19.37% and 24.35% respectively. Compared with the one-year-old honeysuckles, root biomass of the three-year and six-year honeysuckles increased by 82.67% and 191.26% respectively in the near-root zone. Honeysuckle root biomass was strongly and positively correlated with the total flow reduction rates (R²=0.801) and total sediment reduction rates (R²=0.911). In general, honeysuckle could control soil erosion on gneiss slopes and improve soil erosion resistance to some extent.