In order to screen the remediation technology suitable for Cd pollution of paddy soil and crops in Southwest China, a field experiment was used to compare the effects of single application of lime, biochar, combined application of lime + biochar and their different amounts on the basic physical and chemical properties of Cd contaminated paddy soil, the Cd content and its influence on the enrichment and transportation of various parts of rice. The results showed that single application of lime and biochar as well as combined application can reduce the Cd in rice and the enrichment and transport coefficients of various parts of rice in the first year of restoration test. With the increase of the applied amount, the Cd content of rice showed a decreasing trend, and the Cd enrichment coefficient of soil to rice root system first decreased and then increased. Compound application (lime (1.5 t/hm²) + Biochar) was more effective than single application of lime and biochar. Compared with the control, the Cd content of rice treated with combined application (lime (1.5 t/hm²) + Biochar) reduced by 57.14% ~ 88.57%, and the enrichment coefficient of soil to rice root system reduced by 22.06% ~ 32.96%. The application of lime could significantly increase soil pH and reduce the soil available Cd content. In the second year of the remediation agent application continuation effect test, the effect of lime in reducing soil effective Cd and rice Cd in a short period of time was better, but its long-term effect and stability were not as good as biochar. Compared with the control, the effective Cd of soil treated with single application of lime, biochar and combined application reduced by 2.97% ~ 25.19%, 13.94% ~ 23.41%, and 1.93% ~ 21.41%, respectively, and the Cd content of rice reduced by 0.72% ~ 34.87%, 12.11% ~ 49.14%, and 36.55% ~ 51.71%, respectively. Overall, under the experimental conditions, the combined application (lime (1.5 t/hm²) + biochar (3.0 t/hm²) had the best effect.