The aim of this study was to determine the effect of alfalfa on reproductive characteristics Black Slavonian pig, and the production and carcass traits of fattening pigs of this breed. The first part of exploring conducted on 20 Black Slavonian pig which were divided into two groups of 10 sows. Sows experimental group treated with the standard meal and additional green alfalfa meal in an amount of 5 kg per day during the study period. The second part of the research was carried out on 40 of Black Slavonian fattening pigs who were divided into two groups of 20 pieces. The experimental group received during the last six months fattening, with a standard meal, even green alfalfa at will. A larger number of weaned piglets and higher average weight of weaned piglets with sows that received the green alfalfa overall positive evaluation of the composition of the feed material and the amount of milk. For properties that largely determine the value of half of (the thickness of the muscle and bacon, conformation) and quality of muscle tissue (color and water holding capacity) resulted in statistically significantly better value of the slaughtered carcass and muscle tissue of fattening pigs that are given the green alfalfa meal. Green alfalfa meal in a positive effect on the reproductive performance of sows and on carcass traits of slaughtered carcasses and technological properties of the muscle tissue of Black Slavonian pigs.