The invention relates to a method for preparing natural 
plant granular materials for filter tips, which comprises the steps of: taking dry 
plant stem 
pith, removing impurities and pulverizing and sieving the stem 
pith to obtain powdery materials with the mesh number greater than 80 meshes; uniformly mixing the powdery materials and auxiliary materials according to the proportion of the 
mass ratio being 10 / 10 to 0, obtaining the powdery 
mixed materials, stirring and uniformly mixing the powdery 
mixed materials by 
ethanol solution or water according to the proportion of the material 
liquid ratio being 4 to 0.5 / 1 and making the 
mixed materials into 
soft materials; or stirring and uniformly mixing the powdery mixed materials and water solution of the auxiliary materials according to the proportion of the material 
liquid ratio being 4 to 0.5 / 1 and making the mixed materials into 
soft materials; carrying out 
extrusion type 
granulation on the 
soft materials, and then 
drying granules; and sieving the dried granules by a 
sieve of 20 to 80 meshes, and the required natural 
plant granular materials for the filter tips are obtained. The natural plant granular materials for the filter tips prepared by the method has the advantages that when natural 
plant stem pith granules are thinner, 
static electricity and agglomeration properties can be eliminated, the 
powder granulation performance is enhanced, and the addition 
operability of the natural 
plant stem pith granular materials during the 
cigarette filter stick manufacture is improved.