Blade dynamic compensation structure of vertical biaxial stirrer and operating method

The invention relates to a blade dynamic compensation structure of a vertical biaxial stirrer; the blade dynamic compensation structure comprises a stirring tank and a biaxial stirring unit arranged in the same; the biaxial stirring unit includes a first rotary shaft and a second rotary shaft arranged side by side, as well as four die cavities arranged below the stirring tank and the biaxial stirring unit. The problem that blades of corresponding stirring arms on first and second rotary shafts of a prior biaxial stirring unit are angularly asymmetric. The blades of the corresponding stirring arms on the first and second rotary shafts in the biaxial stirring unit are adjusted to be symmetric so that particles near the first rotary shaft are kept as many as those around the second rotary shaft, and material is evenly distributed in the four die cavities; the operating method ensures that no cutter colliding occurs when trajectory circles of the rotary arms on the first and second rotary shafts close to each oth