Surveying and mapping instrument for engineering surveying and mapping

The utility model discloses a surveying instrument for engineering surveying, which comprises a base plate, the surveying instrument is arranged on the surface of the top end of the base plate, an angle adjusting mechanism is arranged at the joint of the surveying instrument and the base plate, a protective cover is arranged on the surface of one side of the surveying instrument, and rotary connectors are arranged at four corners of the surface of the bottom end of the base plate. Supporting legs are arranged in the rotary connectors, inner rods are sleeved with the supporting legs, a plurality of inserting holes are formed in the inner rods, inserting pins are arranged in the inserting holes, fixed conical feet are arranged on the surfaces of the bottom ends of the inner rods, and a vertical rod is arranged at the center of the surface of the bottom end of the base plate; a gear of the angle adjusting mechanism is matched with a clamping rod, a rotary knob is used for driving the gear to drive the clamping r