Portable multichannel gas detector

The utility model relates to the technical field of gas detection, in particular to a portable multi-channel gas detector which comprises a detector main body, a gas detection channel is arranged in the middle of the end part of the detector main body, and an instrument mainboard is arranged on the rear upper side in the detector main body. A gas detection assembly is arranged on the front upper side of the interior of the detector body and comprises a three-way pipeline connected with a gas detection channel in a matched mode, a first electromagnetic valve is installed at the left end of the three-way pipeline, and a first gas analysis module is installed at the lower end of the first detection pipeline; a second electromagnetic valve is arranged at the right end of the three-way pipeline, a second gas analysis module is arranged at the right end of the second detection pipeline, expired gas can be detected in a targeted mode through different channels through the gas detection assembly, the overall structur