Abstract: Charpy impact test, in which specimens were cut out from the surface and center of plate, is empoloyed to investigate the effect of center segregation on continuous casting 10CrNi3MoV steel plate and its HAZ at various temperatures.The results show that center segregation deteriorates the impact property of center and the impact value of center specimens are lower than that of the surface specimens, on the other hand,there is a trend that the decrement of the impact value increase as the test temperature dropping.