Portable testing device for benzene series in soil

The invention discloses a portable testing device for benzene series in soil, and relates to the field of soil benzene series detection, the portable testing device comprises a plurality of sampling barrels which can be stacked in sequence to form a barrel-shaped structure, and further comprises a plurality of locking mechanisms, each locking mechanism is arranged between two adjacent sampling barrels, each locking mechanism comprises an annular connecting piece, a limiting piece and a locking piece, the annular connecting piece comprises two ring bodies, the two ring bodies are connected with the two adjacent sampling barrels respectively, and the limiting piece is installed between the two ring bodies; according to the portable testing device for the benzene series in the soil, the locking mechanism used for being connected with the sampling barrel is arranged on the side, opposite to the ring body, of the sampling barrel, the problem that the locking mechanism protrudes out of the outside, so that the resi