Portable sampling instrument for geological stratification

The invention relates to the field of geological sampling, and discloses a geological stratification portable sampling instrument which comprises a base, a hydraulic telescopic rod is fixedly connected to the upper surface of the base, a cross arm mechanism is rotatably connected to the outer side wall of an output shaft of the hydraulic telescopic rod through a rotating shaft, and a telescopic positioning mechanism is fixedly connected to the left side of the cross arm mechanism; the lower surface of the cross arm mechanism is fixedly connected with a rotary driving mechanism, the right end of the cross arm mechanism is fixedly connected with a mounting block, and the lower surface of the mounting block is rotatably connected with a sampling mechanism through a rotating shaft; by arranging the cross arm mechanism and the telescopic positioning mechanism, sampling points of the sampling mechanism can be controlled by rotating the cross arm mechanism and adjusting the length of the cross arm mechanism, so that