Abstract: In order to disclose the differences of brown rice grain traits and mineral elements among bred giant embryo rice (BGE), introduced japanica giant embryo rice (IGE) and parental indica normal embryo rice (NE), parameters of grain traits and embryo characters of three groups brown rice were analyzed, and six important mineral elements contents of brown rice were detected. The results were showed as follows : 1) The embryo size of all giant embryo rice (GE) is about 4 times of NE. The BGE inherited the giant embryo traits from IGE parents, and preserved the grain traits of NE parents. The increase of GE grain weight was beneficial to enhance its absolute embryo weight, but it was notably negative to the relative embryo weight. 2) Compare with '91-308', most of the contents of potassium, magnesium, calcium, iron, manganese and zinc in 4 GE brown rice increased by a wide margin, and the average increasing extent were 30.2%, 9.4%, 75.8%, 8.3%, 58.3% and 23.0%, respectively. The contents of potassium, magnesium and calcium of BGE brown rice were higher than that of the IGE parents. In conclusion, BGE maintained the grain traits of the indica parental NE and inherited the characteristics of giant embryo and high mineral elements contents from the japanica parental IGE in the process of hybrid selection.