The invention discloses a multi-user channel distribution method for captured information based on a Beidou short message system, and belongs to the field of navigation communication. The implementation method comprises the following steps: allowing a capture module to transmit captured information and a capture identifier to a multi-user distribution module, and define and name the identifier anda channel end instruction respectively; When the channel distribution module receives the capture identifier, comparing the phase difference between the capture information coming along with the capture identifier and the capture information in all the occupied channels, and judging whether the capture information needs to be distributed or not; Allocating the captured information needing to be allocated to the unoccupied channel with the maximum number, wherein the channel occupation identifier is assigned to be 1; When the decoding in the channel is finished or the frame synchronization isfailed, assigning a channel finishing instruction to be 1; And when the channel end instruction of the channel is 1, resetting the channel occupation identifier, the capture information repetition identifier and the channel end instruction of the channel, and converting the channel into an idle state; and repeating the above steps to realize an efficient and ordered channel distribution task.