Magnetorheological (MR) valves are widely used in hydraulic systems due to its fast response time and pressure drop regulation. A MR valve with mosquitoplate fluid flow channels was developed, and the fluid flow channels that was separated by mosquitoplate arc baffle between the damping disk and positioning plate mainly consisted of two Newtonian fluid circular pipe flow, one Newtonian fluid annular flow, two nonNewtonian fluid disk flow and two nonNewtonian fluid spiral flow. The working principle and structure of the developed MR valve was expounded, and the mathematical model of pressure drop was also derived. Finite element modeling of the MR valve was carried out by ANSYS/Emag software to simulate the electromagnetic field, including achieving the changes of the magnetic flux density along the fluid flow paths, and the variation of pressure drop and yield stress was also analyzed. The simulation results showed that the pressure drop can reach 5.58MPa at the applied current of 2.0A. The test rig of the MR valve performance was set up, and the pressure drop was tested under different applied currents and simulated load cases. The experimental results showed that the pressure drop can reach 5.1MPa when the applied current was 2.0A, which had better performance compared with that of conventional radial flow MR valve. At the same time, the experimental results showed that the designed MR valve had a faster response time at different flow rates, and the rising response time was shorter than that of falling response time. 