To obtain an acetamiprid pesticide carrier with high loading rate and good subtained-release properties，the acetamiprid hydrogel beads, which used bentonite as an adsorbent and film-forming properties of chitosan, were prepared by the extrusion-exogenous gelation method. And their structure, morphology and performance were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron micrograph (SEM), thermogravimetry (TG), water-up tests and release studies. Experimental results showed that the obtained hydrogel beads were 1.42~1.71mm in diameters. Bentonite could improve the hydrogel beads’ size and sphericity and make the drug loading rate and encapsulation efficiency of acetamiprid upgrade from 4.16% and 36.36% to 4.91% and 63.01%, respectively. Chitosan and sodium alginate had formed the polyelectrolyte complexes by electrostatic interactions assisting in crosslinking by calcium ion and made the drug loading rate and encapsulation efficiency of acetamiprid upgrade from 4.16% and 36.36% to 5.23% and 54.29%, respectively. Bentonite contains a lot of hydroxyl groups on the surface that could form the hydrogen bonds with the sodium alginate and chitosan, which could effectively inhibit calcium alginate large swelling to improve the performance of their release.