Abnormality diagnosis method and abnormality diagnosis device for mixing plant and mixing plant

The invention provides an abnormality diagnosis method and an abnormality diagnosis device for a mixing plant, and the mixing plant. The mixing station comprises a powder measuring hopper, an aggregate waiting hopper, a supporting platform and a mixing main machine, the powder measuring hopper and the aggregate measuring hopper are both installed on the supporting platform, and a discharging opening of the powder measuring hopper is connected with an upper cover of the mixing main machine through a soft connecting piece. The abnormality diagnosis method comprises the following steps: acquiring a first state parameter of a mixing station when an aggregate waiting hopper is in an empty state and a second state parameter of the mixing station when the aggregate waiting hopper is in a full state; and according to a comparison result of the first state parameter and the second state parameter, judging whether the mixing station has an abnormal measurement fault. The abnormity diagnosis method and the abnormity dia