A kind of multi-chamber cascaded electrorheological valve was proposed. Some parallel plate electrodes with distributing axial-flow holes were set in it. The valve could meet requirement of wide range speed regulation because its flow gap and number were adjustable conviniently. The fomula of pressure difference was deduced,so the inherent laws among pressure difference,field intensity,flow rate and chamber height were discovered. The fluid pressure distribution and flow condition in the valve were simulate...