Three hundred and fifty paddy soil samples collected from representative districts of China were studied. The analytical results showed that the content of BHC remained in the plowed layer (1-15 cm) ranged from 0.021 to 1.96 ppm with an average of 0.307 ppm. In 83.1% of samples, the residue of BHC in sail was less than 0.5 ppm. The sequence of the residues of four isomeric BHC were in the order of β>α>δ>γ. Experimental results showed that under the submerged conditions these isomers were degradated rapidly and almost disappeared within two months.The analytical results of 25 samples of brown rice showed that correlation between the content of BHC in brown rice and its residue in soil after harvest was not significant (r=0.379). However, the content of BHC in brown rice was increased with the increase. of the amount of applied BHC in growing season of the rice. Its correlation coefficient r=0.68 and the significance amounts to 99%.