The invention discloses a multiplexer structure based on a dielectrically integrated suspension line. The multiplexer is an N-multiplexer, wherein N is a positive integer greater than or equal to 2, the N-multiplexer comprises first to Nth band-pass filters, and each band-pass filter comprises a low-pass filter and a high-pass filter that are connected to each other; and when the multiplexer is aduplexer, one end of the second low-pass filter is the input end of the duplexer, the other end of the second low-pass filter is connected with the second high-pass filter and the first low-pass filter through a T-type junction, the other end of the second high-pass filter is a second output end, the other end of the first low-pass filter is connected with the first high-pass filter, and the otherend of the first high-pass filter is a first output end. According to the scheme, the problem of ensuring a high isolation degree between channels when the multiplexer receives and transmits signalsat the same time can be solved, and the mutual interference of the channels can be avoided.