Optimum pasture management during the summer season is an important factor to maintain good regrowth and persistence of pasture. This field experiment was carried out to investigate the effects of the cutting management on the regrowth, dead plants, weed appearance, root activity and D.M. yield of orchardgrass pasture during the mid-summer season. Two different the third cutting times (July 15 and Aug. 3) as the mainplot, and three different cutting heights (3,6 and 9 ㎝) at the third cut as the subplot were treated, and the experiment was done at Livestock Experiment Station, in Suweon, 1985. 1. Temperature of soil surface and underground after the third cut tended to decrease by 1-4℃C as cutting height was high, and soil moisture content also decreased as stubble height was high. 2. Regrowth leaf length, leaf area and root activity of orchardgrass after the third cut increased significantly with the high cutting height (P$lt;0.05). 3. The percentage dead plants and weeds after the third cut were significantly decreased (P$lt;0.05) with the high stubble height during the mid-summer season, and main weeds appeared after the third cut were Digitaria sanguinalis$gt;Portulaca oleracea$gt;Cyperus iria, Rumex cripus, and so on. 4. Regrowth dry matter yield at the fourth and fifth cut were significantly increased (P$lt;0.05) with the high stubble height, regardless of cutting time. 5. From the above results, it is suggested that the 9㎝ cutting height during the mid-summer season is the most effective for good regrowth, weed control and forage yield of orchardgrass pasture.