Portable volatile gas detector

The utility model discloses a portable volatile gas detector, which belongs to the technical field of gas detection and comprises a detector main body, mounting seats are arranged on the upper side and the lower side of the detector main body, and channels matched with the detector main body are formed in the surfaces of the mounting seats; through cooperative use of the first protective shell and the second protective shell, when the detector main body is carried daily, the first protective shell and the second protective shell are fixed on the front surface of the detector main body through the clamping assembly so as to protect the button switch and the display screen of the detector main body, so that the button switch is prevented from being touched by mistake and the display screen is prevented from being extruded by mistake; in the process of using the detector main body, no user can rotate the first protective shell and the second protective shell to the back surface of the detector main body, and the