In 2022 we studied beetle fauna of the in three study sites of the territory of Šúr Nature Reserve by using two entomological methods (pitfall traps and Malaise trap). Totally, we collected 634 beetle species belonging to 65 families. From three study sites the highest species richness we recorded on study site Panonský háj (degraded old open oak forest overgrown by shrubs) represent community of flying beetles (393 species captured by Malaise trap). We monitored the impact of intensive cattle grazing on ground dwelling beetle commnities in two studied habitats (grassland and alder forest) by mehod of pitfall traps. This effect has an impact on the composition of beetle community of studied grasland (number and abundance of xerotherm species with an affinity for steppe formations are increasing). On other hand, the beetle community of studied alder forest was stable and represented typical composition for this type habitat. From the sozological point of view, we recorded occurrence of several indication species (e.g. Thambus frivadszkyi, Trox cadaverinus), two redlisted species (protected also by national legislation) and species Clypastraea reitteri that is new for Slovak fauna.