Field investigation tool convenient to carry

The utility model relates to the field of urban and rural field investigation tools, in particular to a portable field investigation tool which comprises a box body, a fixing assembly is fixedly connected to the surface of the top of the box body, a pop-up assembly is arranged in the box body, and the fixing assembly comprises a U-shaped block fixed to the surface of the top of the box body. A concave plate is installed on the inner side surface of the U-shaped block through a rotating shaft, a connecting plate is installed on the inner side surface of the concave plate through a rotating shaft, a square groove is formed in the side surface of the connecting plate, a limiting groove is formed in the side surface of the square groove, a limiting column is arranged in the limiting groove, and a concave block is fixedly connected to the surface of the limiting column. The connecting plate and the safety groove are arranged in the fixing assembly, the first spring and the sliding plate are arranged in the square