Sample dilution device and sample analyzer

The utility model discloses a sample dilution device and a sample analyzer. The sample dilution device comprises a liquid adding level, a liquid adding mechanism and a transfer position, and the liquid adding level is used for loading a first dilution cup; the liquid adding mechanism is arranged above the liquid adding level and is used for sucking diluent and sample liquid and adding the diluent and the sample liquid into the first dilution cup at the liquid adding level to form primary diluted sample liquid; the transfer position is arranged below the liquid adding mechanism and is used for receiving a first dilution cup filled with a primary dilution sample liquid; the liquid adding mechanism is also used for sucking the diluent and the primary dilution sample liquid and adding the diluent and the primary dilution sample liquid into the second dilution cup to form a secondary dilution sample liquid. In this way, multiple dilution of samples can be achieved, operation is convenient, and the space utilizatio