Four kinds of gloss-reducing agents were introduced into PC/ABS blends used for inner decorative articles of automobiles.The effects of these agents on gloss reducing and mechanical properties of the blends were compared.It was found that all the four were effective in gloss-reducing.BMAT was harmful to the impact strength,AX8900 could lower the modules.KS-TD-00201 and KS-TD-00202 had no effects on the mechanical properties and were of low price,consequently should be selected.