A listen before talk, LBT, subband division method, the method comprising: obtaining (S101) first information, wherein the first information comprises information about frequency domain starting and ending positions of a target, and the target comprises a carrier or a bandwidth part, BWP; and dividing (S102) the target into LBT subbands based on the information about the frequency domain starting and ending positions; wherein the first information further comprises: information about a frequency domain segmentation position; and the dividing (S102) the target into LBT subbands based on the information about the frequency domain starting and ending positions comprises: dividing the target into P LBT subbands from the frequency domain starting position of the target based on the frequency domain segmentation position, characterized in that the target is a carrier, and the first information further comprises: information about frequency domain starting and ending positions of a BWP; and the method further comprises: determining that the frequency domain starting position of the BWP is located at a first position of the LBT subband of the carrier; determining that the frequency domain ending position of the BWP is located at a second position of the LBT subband of the carrier; and dividing the BWP into R LBT subbands based on the first position and the second position. obtaining (S101) first information, wherein the first information comprises information about frequency domain starting and ending positions of a target, and the target comprises a carrier or a bandwidth part, BWP; and dividing (S102) the target into LBT subbands based on the information about the frequency domain starting and ending positions; wherein the first information further comprises: information about a frequency domain segmentation position; and the dividing (S102) the target into LBT subbands based on the information about the frequency domain starting and ending positions comprises: dividing the target into P LBT subbands from the frequency domain starting position of the target based on the frequency domain segmentation position, characterized in that the target is a carrier, and the first information further comprises: information about frequency domain starting and ending positions of a BWP; and the method further comprises: determining that the frequency domain starting position of the BWP is located at a first position of the LBT subband of the carrier; determining that the frequency domain ending position of the BWP is located at a second position of the LBT subband of the carrier; and dividing the BWP into R LBT subbands based on the first position and the second position. dividing the target into P LBT subbands from the frequency domain starting position of the target based on the frequency domain segmentation position, characterized in that the target is a carrier, and the first information further comprises: information about frequency domain starting and ending positions of a BWP; and the method further comprises: determining that the frequency domain starting position of the BWP is located at a first position of the LBT subband of the carrier; determining that the frequency domain ending position of the BWP is located at a second position of the LBT subband of the carrier; and dividing the BWP into R LBT subbands based on the first position and the second position. determining that the frequency domain starting position of the BWP is located at a first position of the LBT subband of the carrier; determining that the frequency domain ending position of the BWP is located at a second position of the LBT subband of the carrier; and dividing the BWP into R LBT subbands based on the first position and the second position. <EOS>