Bis (2-ethylhexyl phthalate) (DEHP) is a widely used plasticizer. The toxicity of bis (2-ethylhexyl) phthalate was described in this paper. It has been found that it has reproductive toxicity, neurotoxicity, nephrotoxicity, endocrine toxicity and cardiotoxicity. It is mainly exposed to the environment, resulting in air, water, soil and other pollution. This paper mainly studies its toxicity to the body, and understand its pollution to the environment, so that we can prevent, reduce the intake of the body.