In view of the fact that the damping channel of magnetorheological valve is simple and its pressure drop adjustment is small, a magnetorheological valve based on axial annular liquid flow channel mixed magnetic source was designed.Its structure and working principle were described, and the mathematical model of pressure drop was deduced.The magnetic field of the mixed magnetic source magnetorheological valve was simulated by finite element method. The effects of input current, damping gap of liquid flow channel, ring thickness and magnetic isolation ring thickness on the pressure drop of magnetorheological valve were analyzed.The results show that the pressure drop of the valve gradually increases with the increase of the input current and decreases with the increase of the damping gap of the liquid flow channel.It decreases with the increase of ring thickness and isolation ring thickness. The influence of isolation ring thickness is the smallest, and the influence of liquid flow channel damping gap is the largest.When the liquid inlet velocity is 4 L/min, the input current is 2 A and the damping gap of the liquid channel is 1 mm, the saturated magnetic pressure drop of the mixed magnetic source magnetorheological valve can reach 8.553 2 MPa.