Abstract: Ca potentiators effect of Ca, Cu, Mn, Mg, Fe and Zn contents and quality in japonica rice were studied. The result indicated that five Ca potentiators all increased Ca contents, especially, Active calcium-S potentiator of 360mg/kg special effect in rice, increased 54.5% than CK. Five Ca potentiators increased Fe, Mg and Zn contents obviously, but decreased Mn and Cu contents. Different Ca potentiator has different effect on mineral elements contents in rice. Multiple regression analysis shows that Ca content is close to Fe and Mn contents positive correlation. In the meanwhile, Ca content has conspicuously positive correlation with AC, but has onspicuously negative correlation with CPV, SBV, CVS and PAT. Microelements and some quality characters are closely correlation.