Sample analyzer and magnetic bead reagent blending method

The invention discloses a sample analyzer and a magnetic bead reagent mixing method. The sample analyzer comprises an ultrasonic device, a controller, a reagent bearing mechanism and a reagent separate injection mechanism, and the controller is used for controlling the ultrasonic device to emit ultrasonic waves into the magnetic bead reagent which is not pretreated. The sample analyzer is provided with the ultrasonic device, the ultrasonic device is used for transmitting the ultrasonic waves into the magnetic bead reagent which is not pretreated, and the ultrasonic waves can uniformly disperse the magnetic beads in the magnetic bead reagent which is not pretreated, so that a subsequent reagent needle can absorb the magnetic bead reagent with uniformly distributed magnetic beads, and the detection accuracy can be ensured. The ultrasonic device on the sample analyzer can perform ultrasonic uniform mixing operation on a magnetic bead reagent which is not pretreated, so that the magnetic bead reagent does not nee