Abstract: A new micro-pump was successfully designed by using the magnetic fluid movement controlled by the external magnetic field.The experimental results show that the maximum output pressure is 1180 Pa,and the maximum output flow-rate is 50 μl/min,the relation between output pressure,flow-rate and rotation velocity is nearly linear when the rotation velocity is smaller.However,the output pressure and flow rate fall quickly when the rotation velocity exceeds a critical value.An excellent fluid driving component for the MEMS was supplied.