A plug-in oxygen-deficient heating smoking set, comprising a cigarette accommodating cavity , characterised in that , wherein the smoking set also comprises a smoke extraction element that is fixed in a cigarette accommodating cavity ; The smoke extraction element comprises a hollow smoke extraction cone (6-1) and a mainstream smoke forming tube (6-2) that is fixedly or detachedly sleeved on the peripheral of a cone body (6-1-1) of the smoke extraction cone (6-1); The hollow part of the hollow smoke extraction cone (6-1) has a tapered structure, and the top and/or the side wall of the hollow smoke extraction cone (6-1) has a cone hole (6-1-2), there is at least one cone hole (6-1-2); The mainstream smoke forming tube (6-2) has an internal cavity (6-2-1), and the outline of the cavity (6-2-1) has a Venturi tube structure, namely, a tapered narrowing upstream structure and a gradual expansion downstream structure connected by a cylindrical cavity with a small inner diameter, at least one through hole (6-2-3) is disposed on the circumferential side wall of the mainstream smoke forming tube (6-2), the through hole (6-2-3) is located upstream of the tapered upstream cavity of the mainstream smoke forming tube (6-2), the axial distance between the through hole (6-2-3) and the bottom surface of the cone body (6-1-1) is less than that between the cone hole (6-1-2) and the bottom surface of the cone body (6-1-1); The inner diameter of the cigarette accommodating cavity is greater than the outer diameter of the smoke extraction element ; An airflow channel (6-3) connected to the cavity (6-2-1) is located between the inner wall of the tapered cavity of the mainstream smoke forming tube (6-2) and the outer wall of the cone body (6-1-1). The smoke extraction element comprises a hollow smoke extraction cone (6-1) and a mainstream smoke forming tube (6-2) that is fixedly or detachedly sleeved on the peripheral of a cone body (6-1-1) of the smoke extraction cone (6-1); The hollow part of the hollow smoke extraction cone (6-1) has a tapered structure, and the top and/or the side wall of the hollow smoke extraction cone (6-1) has a cone hole (6-1-2), there is at least one cone hole (6-1-2); The mainstream smoke forming tube (6-2) has an internal cavity (6-2-1), and the outline of the cavity (6-2-1) has a Venturi tube structure, namely, a tapered narrowing upstream structure and a gradual expansion downstream structure connected by a cylindrical cavity with a small inner diameter, at least one through hole (6-2-3) is disposed on the circumferential side wall of the mainstream smoke forming tube (6-2), the through hole (6-2-3) is located upstream of the tapered upstream cavity of the mainstream smoke forming tube (6-2), the axial distance between the through hole (6-2-3) and the bottom surface of the cone body (6-1-1) is less than that between the cone hole (6-1-2) and the bottom surface of the cone body (6-1-1); The inner diameter of the cigarette accommodating cavity is greater than the outer diameter of the smoke extraction element ; An airflow channel (6-3) connected to the cavity (6-2-1) is located between the inner wall of the tapered cavity of the mainstream smoke forming tube (6-2) and the outer wall of the cone body (6-1-1). <EOS>