Abstract: The adsorption process of Zn²⁺ by white diatomite from Changbai Mountain Area in Jilin Province was investigated, with various influencing factors discussed. Test results show that the adsorption process is efficient and quick, in which an equilibrated adsorption can be got within about 10 minutes and better adsorption effect will come true with pH value under neutral conditions than under acidic conditions. Solution temperature affects obviously the adsorption effect. Up to 99.71% Zn²⁺ can be removed using 10 g/L diatomite to adsorb it from the solution with a concentration of 9.8 mg/L Zn²⁺ . After a secondary adsorption, the removing rate approaches to 100%. By SEM it is found that the surface and pores of diatomite are the main adsorbing positions.