Positioning and fastening system for combining planks

A positioning and fastening system for combining planks, comprising:

• at least two planks, combined to form a block of wall, each of which has a junction surface at one end plane to contact with the other plank and a clamping surface at the other end plane wherein the junction surface on each of the planks is designed to have a positioning counterbored hole, the clamping surface on each of the planks is designed to have a pre-burying counterbored hole for nut opposite to the positioning counterbored hole, and both the positioning counterbored hole and the pre-burying counterbored hole allow a bolt hole to penetrate in between;
• a positioning pin, which develops a bolt passage centrally and is buried in and between two positioning counterbored holes at the two planks to be joined by the junction surfaces to fix their relative position;
• two nuts, each of which has a screw hole centrally and is inserted into and fixed in the pre-burying counterbored hole at each of the two planks;
• and
• a junction bolt, which has a specific design of the present disclosure and penetrates from the nut at anyone of the two planks and is fastened in the screw hole of the nut at the other plank through the bolt passage of the positioning pin.