In this paper, the pot experiment was conducted to study the effect of fruit biochar and swine biochar on the physicochemical properties of heavy metal contaminated soil and spinach growth in mining areas at the biochar concentration of 0, 5% and 10% (in terms of dry soil). The results showed that after adding the fruit biochar and swine biochar to the soil, the pH of G5, G10, Z5, and Z10 treatments increased by 0.02, 0.05, 0.04, and 0.08 units respectively, compared with the CK group. The available potassium content of soil and the potassium absorbed by spinach increased with the increase of the two biochar applications, while the available phosphorus content of soil and the phosphorus absorbed by spinach decreased slightly with the increase of the two biochar applications. Compared with... fruit biochar, swine biochar significantly increased the available po-tassium and available phosphorus in the soil. After adding biochars, the fresh weight and plant height of spinach also increased, but it was not positively correlated with the application rates, and it was related to the physical properties of the soil and the light, temperature and humidity conditions of the spinach growth. On the whole, the application effect of swine biochar in this ex-periment was better than that of fruit biochar, and the biochar concentration of 10% was better.