Abstract: Taking the Yichang part of the Hurongxi expressway as an example for studying the characteristics of soil loss of dump,the factors,such as prepicitation,soil,plant and amount of soil loss were observed.The results showed that: 1) The relation between amount of soil loss and product of prepicitation and railfall intensity was found to be a better linearity.While taking no account of other factors in affecting the soil loss of slope,with the PI increaing,the amount of soil loss gradually enlarged.2) Comparing the dump taken on the bio-measure and engineering measure with the unprotected one,soil loss of protected dump is reduced more than the unprotected dump.3) Physical composition of dump surface affects the amount of soil loss.When the dump surface damaged by rain,the content of gravel became bigger,and then the amount of soil loss would become smaller gradually.