The invention discloses a modular blocking, resisting and compensation composite silencer. The modular blocking, resisting and compensation composite silencer is formed by connecting at least three pipe sections which are the first pipe section for silencing in a blocking mode, the second pipe section for silencing in a resisting mode and the third pipe section for silencing in a resisting mode. A silencing sheet assembly is arranged in the first pipe section and the face, in contact with air flow, of the first pipe section is provided with an aluminum perforated plate; the second pipe section is not equal to the third pipe section in length and comprises an outer panel, an inner mesh plate, a mesh annular frame, a mesh annular frame support and a mesh annular frame covering board, an expansion cavity is formed by the mesh annular frame and the mesh annular frame support, and a resonating cavity is formed between the outer panel and the mesh annular frame covering board. The aluminum perforated plate is arranged outside the silencing sheet assembly, the inner portion of the silencing sheet assembly is filled with sound absorption materials, and the first pipe section, the second pipe section and the third pipe section are riveted into a whole through rivets via a rubber sheet and a hoop. The modular blocking, resisting and compensation composite silencer is simple in structure, convenient to install and capable of enabling each frequency band to be good in silencing effect through a blocking and resisting type silencing and mutual compensation method.