This paper summarized TONG Xiaolin's clinical experience in using "poisonous" Chinese material medica to treat metabolic diseases， who believes that toxicity reducing and efficacy enhancing can be achieved through carefully considered dosage， reasonable combination of medicinals， and appropriate preparation and administration ways.By analyzing the functions of Chinese material medica and findings from modern pharmacology and toxicology， the clinical dosage features， combination of medicinals and medication， preparation and administration methods and other precautions have been summarized regarding Huanglian （Rhizoma Coptidis） in treating diabetes， Xixin （Radix et Rhizoma Asari）， Dahuang （Radix et Rhizoma Rhei） and Shuizhi （Hirudo） in treating diabetic kidney diseases， Zhichuanwu （Radix Aconiti Praeparata）， Zhicaowu （Radix Aconiti Kusnezoffii Praeparata）， Xixin and Zhimaqianzi （Semen Strychni Praeparata） in treating diabetic peripheral neuropathy， Yinyanghuo （Herba Epimedii） and Wugong （Scolopendra） in treating diabetic erectile dysfunction， Fuzi （Radix Aconiti Lateralis Praeparata） and Banxia （Rhizoma Pinelliae） in treating diabetic gastroparesis， Hongqu （Monascus purpureus Went） and Weilingxian （Radix et Rhizoma Clematidis） in treating metabolic syndrome， as well as Leigongteng （Radix Tripterygii Wilfordii） and Huangyaozi （Rhizoma Dioscoreae Bulbiferae） in treating Hyperthyroidism， thereby providing reference for precise clinical medication.