Sample liquid dilution and uniform mixing method suitable for chemiluminescence immunoassay analyzer

The invention discloses a sample liquid dilution and uniform mixing method suitable for a chemiluminescence immunoassay analyzer. The method includes vertically and downward moving a sampling needle to the upper part of a reaction cup that needs to be diluted and uniformly mixed, wherein the longitudinal centerline of the sampling needle is offset from the longitudinal centerline of the reaction cup; downward moving the sampling needle to the part, located below the liquid level of a sample liquid, of a liquid suction port; extracting the sample liquid; simultaneously and synchronously descending with the liquid level, and stopping to extract the liquid after the sampling needle descends to a set position; injecting liquid, by the sampling needle, into the reaction cup, wherein the sampling needle synchronously rises with the rising of the liquid level and stops until the liquid level position of the sample liquid is arrived; and repeatedly extracting the sample liquid until the sample liquid in the reaction