Forage grasses can be subjected to conditions that reduce the amount of light, either through intercropping with annual crops or through integration with tree species (silvopastoral system). Therefore, the objective of this work was to evaluate the productive and structural characteristics of grass. mombaça (Megathyrsus maximus), in the establishment phase, subjected to four levels of artificial shading (0, 30, 50 and 70%). The experimental design was completely randomized, with five replications. For this, plant height - PH, tiller length - TL, leaf/stem ratio (LSR), leaf dry mass, stem, dead and total material, tiller population density, individual tiller weight and number of leaves were evaluated. living and dead. Shading of 50% induced greater production of total dry mass (TDM), with no significant effect of TDM for the full sun and 30% treatments. A reduction in the number of tillers (NL) was observed as light was restricted, as well as an increase in plant height, tiller length and tiller dry weight. It is noteworthy that the highest average heights were found in 50 and 70% shading, as well as the highest individual tiller weights. The lowest production of total shoot dry mass and lowest LSR were found in the most severe shading. From the analysis of all variables, it can be inferred that mombaça grass presents better acclimatization in the range of 30 and 50% shading, which gives this cultivar good phenotypic plasticity, thus, the establishment of pasture is recommended in light to moderate shading. Therefore, the mombaça forage grass has potential for use in the silvopastoral system.