In this paper, the effect of the type and amount of water reducing agent on the rheological parameters of concrete was determined by a high-precision rheological meter, and the Bingham equation was fitted. Based on the influence of the three kinds of water reducing agents on the rheological parameters, the effects of the dosage of water reducing agent on the rheological parameters of concrete were summarized. And the law of how the rheological parameters change with time was concluded, which provides some reference and guidance for the reasonable selection of water reducing agent in concrete preparation.