The present invention relates to the field of near-bit logging while drilling (LWD) technologies, and discloses a near-bit constant-current wireless short-distance transmission method and device. The device includes a transmitting portion and a receiving portion, where the 5 transmitting portion modulates a signal and then wirelessly transmits it to the receiving portion within a short distance; the transmitting portion emits a transmitted signal into a stratum according to a set rated transmitting constant current value, and dynamically monitors and adjusts the rated transmitting constant current value of the transmitted signal, to obtain a stable transmitting power. The near-bit constant-current wireless short-distance transmission method 10 and device of the present invention can solve the problem in transmission power consumption during drilling of strata with different resistivity. The device is simple in structure and easy to implement, thus effectively avoiding circuit damage due to an excessively high transmission power consumption. AShort-distance txansmision system is powered on and reet Reporit an Is initialization eor onmal? Perform tinary frequency shift keyg modulation on a tansmitted data skeam, Start transmission at a first transmitting constant current Measure a voltage value andacurrent value during transmission A transmitting processor portion es a judgm Maintain or adjust a transmitting current
Near-bit constant-current wireless short-distance transmission method and device