The invention discloses a portable dust pollution detection device and belongs to the technical field of detectors. The portable dust pollution detection device comprises a detector body and a wrist strap; the wrist strap comprises a memory metal shrapnel and a silica gel layer and is connected with the back surface of the detector body; the memory metal shrapnel is strip-shaped and extends in the length direction of the detector body, the section of the memory metal shrapnel is an inferior arc, and an opening of the inferior arc faces to the detector body; the silica gel layer wraps the outer surface of the memory metal shrapnel, the memory metal shrapnel has a first straightening state and a second state bent towards one side far away from the detector body into a ring shape or a C shape. The portable dust pollution detection device disclosed by the invention can be handheld; when needing to be used or carried, the portable dust pollution detection device can be worn on the wrist strap only through bending the memory metal shrapnel of the wrist strap without occupying a hand of working personnel; when the portable dust pollution detection device can be seen, a wrist only needs to be overturned, so that the operation is simple and convenient, and the carrying is more convenient.