Abstract: The experimental research was made to investigate the properties of a new kind of electro-rheological fluid (A-ERF) composed of silicon oil and fibrin. The material had no deposition and delamination during one month after the prepared A-ERF was sealed, and its shear stress was up to 3 kPa, its breakage voltage was higher than 9kV/mm. The experimental results show that the new electro-rheological fluid can meet the needs in engineering application due to its high stability and other improvement in electro-rheological effect.