The invention provides an n-type anti-explosion air-suction smoke-sensing detector. Through the detector, the problem that none of existing air-suction smoke-sensing detectors reaches an n-type anti-explosion standard is mainly solved. According to the detector, an air sampling component is arranged in a shielding box A (1), a sensor detection and collection component is arranged in a shielding box B (2), the air sampling component is communicated with a to-be-detected gas through an installed air inlet pipe (6) and discharges the detected gas through an installed air outlet pipe, the air sampling component and the sensor detection and collection component form a gas path cycle through a gas path hose (7), the periphery of a shell is turned up and tightened through bolts, and an IP54 protection level can be realized. Through the detector, isolation of the air sampling component and the sensor detection and collection component is realized; the two shielding boxes are both of a double-cavity structure, so that electromagnetic interference is effectively suppressed; and through the integrated structural design of a filter installing slot and the collection shielding boxes, the IP54 protection level can be realized.