The invention relates to a 
synbiotics of 
bacillus licheniformis and 
oligosaccharide class prebiotics and a composite and a formulation thereof, being characterized in that the 
synbiotics comprises 
bacillus licheniformis medical live bacterial 
powder and the 
oligosaccharide class prebiotics, wherein the 
bacillus licheniformis medical live bacterial 
powder contains live 
bacteria about 30 billion / 
gram; the weight ratio of the bacillus licheniformis medical live bacterial 
powder to the 
oligosaccharide class prebiotics is 1:1 to 76; the weight ratio of the medical live bacterial powder of the composite, the oligosaccharide class prebiotics and auxiliary materials is as follows: 1.25-5 percent of the bacillus licheniformis medical live bacterial powder, 5-95 percent of the oligosaccharide class prebiotics, 20-50 percent of preferable oligosaccharide class prebiotics, 30-65 percent of diluting agents, 1-20 percent of bonding agents, 1-15 percent of disintegrating agents, 0.1-3 percent of lubricating agents, 1-10 percent of 
coating agents, 0.01-0.1 percent of 
flavoring agents, 0.0001-0.001 percent of 
coloring agents, and 0.1-15 percent of 
suspending agents. The 
synbiotics composite is prepared into oral common tablets, 
oral cavity disintegration tablets, dispersing tablets, enteric-
coated tablets, granular formulation, enteric-coated granular formulation, capsules, enteric-coated capsules, dry supensoid agents and external tablets according to a conventional process; and an 
in vitro test shows that each formulation can promote the growth and the 
reproduction of the synbiotics of bacillus licheniformis, restrain the growth of harmful 
bacteria, enhance the immunizing power of parasitifers, reduce 
diarrhea and enhance the health care.