Ladle scale for large rotary table weighing apparatus, weighing box whole installation, for the high temperature inside weighing box type weighing sensors, points A, B two groups, respectively, in A big bag of rotary table on two mechanical arms, used to detect the casting of molten steel in ladle, two arms weighing value have A high precision instrument, according to each other with the big screen in the form of A standard interface with the field instruments to realize synchronous display.