Abstract: The invention provides a channel allocation control method for a multichannel biochemistry analyzer, which comprises the following steps: A. setting the item and the amount of samples to be tested; B. executing aspirating and sampling step simultaneously, in which at least two channels are involved in circular aspirating in aspirating step and circular sampling in sampling step. The channel allocation control method for the multichannel biochemistry analyzer has the advantages that: as the entire test is decomposed into aspirating and sampling step and the circular aspirating and the circular sampling in the two steps are simultaneously and independently executed, not only the aim of testing a plurality of channels simultaneously can be realized and the testing efficiency can be improved but also the channel allocation can be performed automatically and different channels can be identified.