The invention discloses a reverse air blowing structure for a mass spectrometer. The reverse air blowing structure comprises a reverse air blowing cone, an internal support component, a sample feeding cone, a heating ring and a baffle ring component, wherein the reverse air blowing cone is provided with a reverse blowing air input opening, the internal support component is arranged inside the reverse air blowing cone, the sample feeding cone is arranged inside the reverse air blowing cone and at the front part of an internal support component and is provided with a sample feeding cavity, the heating ring is arranged on the periphery of the sample feeding cone, and the baffle ring component forms a passage. The reverse air blowing structure has the advantages that the outsourcing standard heating ring is simply arranged at the outer side of the sample feeding cone, and in addition, a reverse blowing air heating passage is added, so that the reverse blowing air preheating effect can be improved, the reverse blowing air temperature is properly raised, the drying atomization effect on ions can be further improved, more effective ions can be increased to enter a subsequent system, the utilization rate of samples can be improved, and in addition, the sensitivity of detecting signals is further improved.