Portable engineering geological exploration drilling machine

The invention relates to the technical field of exploration drilling machines, and discloses a portable engineering geological exploration drilling machine which comprises a support, a semicircular wiping ring and a U-shaped plate, the vertical edges of the two sides of the U-shaped plate are fixedly installed at the two symmetrical ends of the top of the support respectively, a transverse plate slides between the two vertical edges of the U-shaped plate, and a drilling rod is vertically arranged at the bottom of the transverse plate; a sleeve is vertically and rotatably installed at the bottom of the transverse edge of the U-shaped plate, a sleeve rod is connected to the bottom of the sleeve through a spline, the tail end of the sleeve rod penetrates through the transverse plate to be installed at the top end of the drill rod, and a lifting mechanism used for lifting the transverse plate is arranged on the sleeve; and connecting blocks are fixedly mounted on the side surfaces, far away from each other, of th