Self-capture type toxic gas detection equipment

The invention relates to the technical field of detection equipment, and discloses self-capture type toxic gas detection equipment which comprises a detection chamber, the detection chamber further comprises a grading detection device, and the grading detection device comprises a density detection structure and a grading gas outlet structure. The density detection structure comprises a placement box, an output shaft, a sealing sleeve, a density detector and an air outlet pipe, the placement box is fixedly connected to the left side face of the detection chamber, the output shaft rotationally penetrates through the right side face of the placement box, the sealing sleeve is fixedly connected to the inner wall of the bottom of the detection chamber, and the density detector is arranged at the bottom of the detection chamber. The poisonous gases with different densities are separated after the poisonous gases are graded layer by layer by the grading filter membrane, so that the detection of the different poisono