Abstract: Many important achievements were made on the study of the high-speed bulk flow in the magnetotail by using the data from multi-satellites operating in multiple spatial and temporal scales. During a strong storm with duration of about three days, the joint observations by multi-satellites are discussed in this paper. The auroral break-up observed by the IMAGE satellite indicates that there are 14 isolated substorms. In the magnetosphere relatively close to the magnetotail, many Earthward and tailward high-speed bulk flows are observed by the CLUSTER (C1, C3), many earthward and tailward high-speed bulk flows are also observed by the DSP-1 relatively close to the Earth. Features of the earthward and tailward high-speed bulk flows observed at different locations are investigated with multi-satellite observations.