The aim of this study was to evaluate the effect of cutting height (20, 30and 40 cm) and frequency (25, 35 and 45 days) on the nutritional quality ofMombasa and Tanzania grasses (Megathyrsus maximus, Jacq.) in the Sabanassubregion, from the Department of Sucre. The samples of grasseswere collected from plots already established and organized according toa split plots design. The Tanzania cultivar presented higher (p<0.05) drymatter, protein and hemicellulose contents, while higher values (p<0.05)of NDF, FDA, ash and phosphorus were observed in Mombasa cultivar. Thecutting frequency (p<0.05) affected linearly the protein, ash, NDF and hemicellulosecontents and, in a quadratic manner, the dry matter content.The cultivar Mombasa presented a superior range of variation in relationto the protein content, going from 12.3 to 6.5% between the frequenciesof cut 25 and 45 days, which was not observed in the cultivar Tanzania.There was decrease in ash and phosphorus values, and increase in NDFand hemicellulose as a function of the cutting frequency. The FDA contentincreased linearly (p=0.04) as a function of the increase in cutting height.It is concluded that under the study conditions, the nutritional compositionof the evaluated pastures varies according to the cultivar and the givenmanagement, mainly as a function of the cutting frequency. Nutritionally,the Tanzania cultivar presented comparative advantages over Mombasa.