In order to overcome the normal force of the singlesided permanent magnet eddy current braking and improve the braking performance, the characteristics of two doublesided Halbach arrays permanent magnet eddy current braking are studied. The space magnetic field equations are established by using electromagnetic theory, and the analytical expressions of the two systems braking force are derived. And the corresponding finite element model is built to verify the correctness of the analytical solutions. The braking forces of the two doublesided Halbach arrays permanent magnet eddy current braking systems are compared, and the braking force of the scheme 1 is close to twice of that of the scheme 2 at low speed. Finally, the influence of the permanent magnet length, permanent magnet height, air gap, conductor plate conductivity and thickness on the braking performance of scheme 1 is analyzed. The results show that the ratio of length to height of permanent magnet should be 1.2 to obtain the maximum braking efficiency. To avoid the normal force affecting the stable operation of the system, the upper and lower air gaps should be equal. The change of conductor plate conductivity does not affect the maximum braking force, but its corresponding speed will decrease with conductor plate conductivity increase. The change of conductor plate thickness will change the maximum braking force and its corresponding speed at the same time.