The invention relates to a data forwarding device, and discloses a geomagnetic data aggregation forwarder which comprises a power supply device, an MCU (Microprogrammed Control Unit) device, a wireless transmission device, a GPRS (General Packet Radio Service) data transmission device and a geomagnetic data reception device, wherein the MCU device is used for realizing energy saving for the power supply of the wireless transmission device, the GPRS data transmission device and the geomagnetic data reception device through controlling to connect or disconnect the power supply device. The geomagnetic data aggregation forwarder has the advantages that the structure is simple, the chip performance requirement of the MCU device is low, preferable energy-saving effect is provided, the geomagnetic data aggregation forwarder is suitable for the applications of long-time data transmission and has higher application value.