Field surveying and mapping instrument

The utility model relates to the technical field of high-voltage cabinet installation, and particularly discloses an on-site surveying and mapping instrument which comprises an installation table, a gradienter parallel to the installation table, a sleeve fixedly connected to the installation table and a first bevel gear shaft rotationally connected to the interior of the sleeve, and the first bevel gear shaft is meshed with a second bevel gear shaft. The free end of the second bevel gear shaft penetrates out of the sleeve to be connected with a rotary knob, the free end of the first bevel gear shaft penetrates out of the sleeve to be coaxially connected with a rotating disc, and a surveying instrument body and a fixing assembly used for fixing the surveying instrument are installed on the rotating disc. A height adjusting assembly is arranged on the side, away from the surveying instrument body, of the rotating disc, a fine adjustment assembly is arranged on the height adjusting assembly, and the fine adjustm