The invention discloses an independent-type smoke sensing detector. According to the independent-type smoke sensing detector, novel and fine structural design is adopted, so that a shell, a middle buckle and a base can be detachably combined and fixed, and a PCB, a loudspeaker and the middle buckle are detachably combined and fixed; and therefore, the spatial arrangement of the independent-type smoke sensing detector is compact, the internal structure of the independent-type smoke sensing detector is firm, the limiting of components is stable, and assembly production and installation and maintenance are facilitated. A smoke sensing assembly, adopted as an internal core, is of an integrated structure; the PCB, a maze, a receiving tube shielding cover, an infrared emission tube and an infrared receiving tube are connected through surface-mounting processing so as to form an integrated body, and the integrated body is arranged in the middle buckle, so that the detector body of the detector can be assembled; yield is high; production efficiency is high; surface-mounting process difficulty and detector body assembly difficulty are greatly reduced; the internal structure of the independent smoke sensing product is more integrated; the modular production of the independent smoke sensing product is realized; the production efficiency of the independent smoke sensing product is improved; and the structure optimization design and function extension, research and development of the independent smoke sensing product are promoted. The independent-type smoke sensing detector is suitablefor intelligent fire protection.