Abstract: It is first time that the multimedia image processing and fractals analysis have ever been introduced to the study of red blood cells(RBC) aggregation.Also a software package for image processing,which has never been used previously,and a multimedia image processing system are used.The aggregation parameters of RBC are quantitatively measured; the fractals analysis of move image are made.The connection between some characteristic parameters of RBC such as:the aggregated size,aggregating velocity,oblateness degree of RBC,and the half-life time,as well as the fractal dimensions,the information dimension and information entropy,are worked out.