Lactobacilli have not only received GRAS (generally recognized as safe) status, but have also been used as the delivery vector to express heterologous genes and antigens or as a host with probiotic properties and physiological functions [18]. Furthermore, Lactobacilli of animal gastrointestinal tract origin are one of the predominant bacteria in the animal gastrointestinal tract, and have excellent properties of acid and bile salt tolerance as well as a powerful capacity for colonization and adhesion [19]. Thus, it is their unique properties that make expression of heterologous genes in intestinal probiotic strains so promising. Fibrolytic enzyme genes and phytase genes have been cloned and expressed in Lactobacilli in several studies [2,16,20,21]. However, coexpression and secretion of phytase and endoglucanase gene products in intestinal Lactobacilli has not yet been reported. Therefore, this study aimed to generate a multifunctional transgenic Lactobacillus with probiotic characteristics as well as the ability to degrade β-glucan and phytic acid (phytate) for the purpose of improving nutrient availability, increasing production performance and decreasing digestive diseases of broiler chickens. To achieve this we cloned and coexpressed B. subtilis WL001 endoglucanase celW, and A. fumigatus WL002 phytase gene (phyW) mature peptide phyWM, in L. reuteri XC1 isolated from the gastrointestinal tract of broiler chickens. The heterologous enzyme production and the broiler feed effectiveness of this genetically modified L. reuteri strain were studied.