This experiment was carried out to determine the effects of grazing intensity(low, optimum and high) and nitrogen(N) application(0 and 50kg ha^-1) after grazing during mid-summer season on the grass regrowth, utilization efficiency and botanical composition in pasture. The levels of grazing intensity used were set by the number of cows per hectare, which was adjusted according to the grass production. The low and high levels of grazing intensity were 50%(90 AU) and 150% (270 AU) of optimum intensity(180 AU ha^-1 d^-1 The experimental field was grazed with young Holsteins on Aug. 2, 1989. Residual grass heights after grazing were 16.7cm, 10.5cm and 5.1cm in low, optimum and high grazing intensity, and efficiency of pasture utilization was remarkably high in high grazing intensity(90.2%), followed by optimum(80.5%) and low intensity(55.2%). Higher regrowth yield(p $lt;0.05) was observed in low and optimum grazing intensity, and summer depression index was high(1.76-1.80) in high intensity. Good grass coverages were observed in low and optimum grazing intensity. In high intensity, the percentage of bareland and weeds were very high as 40% and 10%, respectively. Also N application during midsummer season was not benefit for grass regrowth and pasture persistence. Based on the results, it may be concluded that optimum grazing intensity and no additional application of N are desirable for good grass regrowth, utilization efficiency and persistence in pasture during mid-summer season.