With a purpose of finding out the influences of herbicide treatment on the forage value and ecological characteristics of grassland vegetations in the Rumex acetosella dominated pasture, this trial was arranged as a randomized block design with three treatments[1) Seeding(cntrol), 2)dicamba 4${ell}$/ha+seeding+dicamba 4 ${ell}$/ha and 3) dicamba 4${ell}$/ha+lime+seeding+dicamba 4 ${ell}$/ha], and conducted in Youngam, Jeonnam Province ftom June, 1995 to October, 1996. In the Rumex acetosella dominated pasture, the treatment of dicamba 4${ell}$/ha+ lime+seeding+dicamba 4${ell}$/ha was improved to the most desirable grassland vegetation with pasture plants of 87%. In the renovated grassland, the life forms of Hemicryptophytes increased greatly by 57.0%, on the other hand Geophytes was much more decreased by 56.8% than those of low productive grassland. The similarity coefficients between grassland vegetation groups were greatly affected by botanical composition. The forage value of standing crop in the renovated grassland with 6.56 was much more increased than low productive grassland with 2.76. The treatment of dicamba 4${ell}$/ha+lime+ seedingdicamba 4${ell}$/ha increased 2 1% of dry mattaer yield, and were high 18- 19% of energy (NEL and TDN) productivity than those of the control(seeding), respectively.