To better analyze the influence of magnetic pole structure on the utilization rate of permanent magnet and realize the adaptability of plate eddy current damper to multi-directional motion， a bidirectional array structure of Halbach permanent magnet is proposed， and the parameters of seven magnetic circuit structure schemes are compared and analyzed. Firstly， by comparing the test results of a plate-type eddy current damper， the accuracy of simulating the damping performance using a three-dimensional electromagnetic finite element transient analysis method is verified. A Halbach cyclic array plate eddy current damper is fabricated. Based on three-dimensional electromagnetic finite element analysis method， the influence of pole number of permanent magnet， back iron of permanent magnet， air gap， conductor plate and other factors on plate eddy current damping coefficient is studied. The research shows that Halbach bidirectional array eddy current damper can maintain good energy dissipation efficiency under multi-direction motion. Through the analysis of simulation results， it is also found that different types of plate-eddy current permanent magnets have similar damping force velocity gradient curves， and the damping force of plate-eddy current dampers at different speeds can be obtained in a short time by relying on the curve function， which can greatly improve the computational efficiency of plate-eddy current damping force.