The solid waste and liquid generated in mining may leave heavy metal elements in soil and hence affect the growth of the crops in the mining area. By selecting Wansheng District in Chongqing as a research area, the measured hyperspectral data of sweet potato and pumpkin and the heavy metal content in the soil samples are collected. By analyzing the correlation of the heavy metal content in the soil with the red edge position of the crops, it is found that different heavy metal content in the soil has different effects on the main crops in the research area. The result shows that in the two main crops, the sweet potato is more sensitive to the heavy metal elements such as Cr, Mn and Cd while the pumpkin can absorb and counteract the above heavy metal elements in soil. This result can provide the theoretical basis for the selection of the crops to be planted in Wansheng District.