Abstract: Semi-dry sodium-modified experiment was conducted using Ca-bentonite produced from Fuxin as raw material.The results show that with Na₂CO₃ dosage of 2.5%，water dosage of 25%，extrusion times of two，the swelling value of modified bentonite can increase from 8.3 mL/g to 55 mL/g and the gelatin value increases from 1.1 mL/g to 5.2 mL/g.With the cue ball generated time of 2 min，grown up for 15 min，tight time for 3 min，properties of pellet produced with bentonite dosage of 1.7% is better than pellet produced with original bentonite dosage of 2.0%.Pellet with bentonite dosage of 1.7%，0.5 m drop strength of green pellets is 4.1 times，explosion temperature is 510 ℃ and the compression strength of green pellet is 9.70 N/P，can meet the requirements of pellet used in metallurgy industry.Semi-dry sodium-modified bentonite can reduce the dosage of bentonite in pellets production.

Key words: Ca-bentonite, Na-bentonite, Semi-dry sodium-method, Pelletizing