Engineering geological investigation hand drill

The utility model relates to the field of geological survey, and discloses an engineering geological survey hand drill which comprises a drill shell, a drill body is fixedly connected in the drill shell, a drill bit is fixedly connected to the drill body, a water tank is fixedly connected to the top end of the drill shell, and a guide pipe is fixedly connected to the bottom of the water tank. A circular groove is formed in the top end of the water tank, a mounting hole is formed in the inner wall of the bottom of the circular groove, a bearing is fixedly connected into the mounting hole, a rotating shaft is fixedly connected to an inner ring of the bearing, a sleeve disc fixedly sleeves the outer side of the rotating shaft, a moving hole is formed in the top end of the rotating shaft, and a rectangular clamping piece is slidably mounted in the moving hole. And one side of the rectangular clamping piece is fixedly connected with a connecting rod, one end of the connecting rod is fixedly connected with a sealin