A variety of toothpaste MaCaJi species and other main ingredients were tested,and the experimental results showed that MaCaJi in all kinds of toothpaste were CaCO3,SiO2,CaHPO4,and Al(OH)3,while the toothpaste of glycerin and some vitamin C toothpaste contended vitamin C,and fluoridated toothpaste of fluorine ion were determined.Some toothpaste MaCaJi calcium carbonate content and the content of silicon dioxide were got quantitative determination.It provided a feasible detection method for the senior high school chemistry experiment of qualitative and quantitative inspection of some contents in toothpaste.