Portable FID detector capable of avoiding flameout

The utility model relates to the technical field of environment detection devices, in particular to a portable flame ionization detector (FID) capable of avoiding flameout, which comprises an FID detector provided with a hydrogen cylinder and a sample inlet. A diaphragm pump is connected between the FID detector and the sample inlet through a pipeline; a first control valve is arranged on a pipeline connected between the sample inlet and the diaphragm pump, and the first control valve is connected with a supplementary gas inlet; the supplementary air inlet is communicated with air far away from the sampling point; the FID detector is in communication connection with the first control valve through a control unit; and the control unit controls the opening and closing of the first control valve according to a signal of the FID detector. According to the utility model, the first control valve is controlled by the control unit, and the first control valve controls the opening and closing of the supplementing gas