Mangetohydrodynamic flow in a rectangular duct with flow channel insert and pressure equalization slot for fusion liquid metal blanket is studied numerically with a two-dimensional fully developed flow model.Velocity field and MHD pressure drop varying with Hartmann number and electric conductivity of FCI is analyzed.Compared with normal duct flow,MHD pressure drop with insulating FCI is reduced significantly.Dimensionless MHD pressure drop decreases as Hartmann number grows.Furthermore,reduction of MHD pressure drop becomes weaker as FCI electric conductivity increases.Reverse flow at pressure slot is related to electric conductivity of FCI.Numerical results are in good agreement with experimental and simplified results.