Calibration device for mobile terminal flow measurement system

The invention relates to the technical field of measurement of network flow, and discloses a calibration device for a mobile terminal flow measurement system. The calibration device comprises a calibration box body and a calibration device circuit, wherein the calibration device circuit comprises a system mainboard, a wireless module group, a touch screen display and a lithium battery pack; the wireless module group is arranged on one side of the system mainboard; a touch screen panel is arranged above the system mainboard; an SIM card insertion slot group and an external USB interface are arranged on the touch screen panel; an equipment restart key switch, a changeover knob switch and a main power supply switch are arranged on the other side of the system mainboard. According to the calibration device, the flow of a three-network mobile terminal is calibrated by adopting a source end and target end joint monitoring mode, so that precise counting of the data flow actually used by a customer from a user terminal is realized; by comparison with charged data of an operator, counting calibration and supervision of a mobile operator charging system are realized, and the legal interest of the customer is maintained.