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The liquid lead lithium mental(Pb-17Li)is one of the most promising tritium breeder or coolant for blankets in the ITER,next-step DEMO and further commercial fusion reactor.The lead lithium eutectic in blanket channels in a strong plasma-confining magnetic field is subjected to a magneto-hydro-dynamic effect and also deposited with a nuclear volumetric heat.This paper makes an assessment to Pb-17Lis performance at a fusion volumetric heat condition with different level of magnetic field by using a finite element code with electromagnetic,fluid and thermal dynamics coupled together.A set of simulation for a typical bended rectangular channel in liquid mental blanket was completed to figure out new phenomena or the impacting factors to its thermal and fluid performance.The present analysis suggests that strong magnetic makes a benefit for flatting the temperature profile,suppressing buoyancy effects and reducing heat flux loaded on first wall,but the undesired MHD pressure drop will dominate the its pressure profile in high Hartman number situation.And an upward flow is suggested to the near-first wall flow to avoid the risk of hot spot in high Grashof number cases.