The invention discloses a free-ranging beef cattle positioning and early warning system which comprises a positioning module, an acceleration sensor and an analysis processing module. The positioning module is arranged on beef cattle and used for collecting position information of the beef cattle; the acceleration sensor is arranged on the beef cattle and used for collecting motion direction information of the beef cattle; the analysis processing module is used for receiving the position information of the beef cattle from the positioning module and the motion direction information of the beef cattle from the acceleration sensor; according to the received information, hot spot paths and feeding regions are acquired through calculation and an early warning is given according to the hot spot paths and the feeding regions. According to the system, the existing single-livestock single-spot monitoring processing capacity is improved to the monitoring processing capacity for a whole pasturing area, multiple pastures and various livestock herds, the function that only behaviors are monitored in the prior art is improved to the function that the early warning is given for abnormality and the behaviors are predicted, a feeder can rapidly and accurately find the lost beef cattle in the field and can find and check the epidemic situation of the beef cattle in time, and loss is reduced.