By referring to the assay for determining the acute toxicity of compounds to environmental organisms, such as fishes,earthworms,silkworms and algaes in “environmental safety evaluation tests of chemical pesticides standards”, the environmental safety of compound SCU-2028 was evaluated. The results showed that the EC50 value against algaes in 72 h was 7.872 mg/L,the LC50 value against fishes in 96 h was more than 12 mg/L, the LC50 value against earthworms in 14 d was more than 40 mg/kg and the LC50 value against silkworms in 96 h was more than 4800 mg/kg. This showed that compound SCU-2028 had low toxicity to environmental organisms.