The invention discloses a 
urea packing bag inner film and a 
processing method thereof and relates to the technical field of plastic films. The 
urea packing bag inner film is prepared from, by weight, 30-40 parts of 
low density polyethylene, 10-15 parts of 
polypropylene, 8-12 parts of disproportionated 
rosin, 6-10 parts of 
terpene resin, 6-10 parts of hydroxypropyl 
methyl cellulose, 5-8 parts of filling mineral 
powder, 5-8 parts of 
microcrystalline wax, 4-6 parts of 
guar gum, 3-5 parts of glyceryl monoleate, 3-5 parts of trioctyl citrate, 2-3 parts of 
natural rubber, 1-2 parts of 
sorbitan monopalmitate, 1-2 parts of chlorinated paraffin and 0.5-1 part of 
sodium hexametaphosphate. The inner film has excellent sealing performance, permeability resistance, 
aging resistance and stability, the situation that 
urea absorbs water in the air and cakes can be effectively prevented, the situation that urea permeates into the inner film and consequently the service life of the inner film is shortened can be prevented, and the situation that urea reacts with inner film ingredients and consequently the purity of urea is affected can be prevented.