Biochemical analyzer with high accuracy

The invention relates to the technical field of biochemical analyzers, and discloses a high-accuracy biochemical analyzer which comprises a shell, a cleaning mechanism and a stirring mechanism, the cleaning mechanism and the stirring mechanism are both located in the shell, the cleaning mechanism comprises a brush head, the brush head is arranged on the lower portion of a first sampling needle, and the stirring mechanism is arranged on the lower portion of the first sampling needle. The cleaning device is used for cleaning the first sampling needle after sampling; the stirring mechanism comprises a stirring rod, a second cover plate is arranged below the stirring rod, a reaction tube is arranged below the second cover plate, air holes are formed in the lower surface of the second cover plate, the stirring rod is used for stirring the mixed liquid in the reaction tube, and the air holes are used for blowing the mixed liquid attached to the surface of the stirring rod into the reaction tube. The instrument is p