Connection piece of columns of goods rack

A connection piece in combination with columns of a goods rack, wherein each of the columns is presented as bending structure;

• the connection piece comprises a connection body for insertion cooperation with two of the columns, the connection body has a bending structure matching each column, and anti-misplacement horizontal support plates facing toward bending inner sides of the connection body respectively and protruding along a direction perpendicular to the connection body are disposed in a middle part of the connection body;
• a first column connection hole is disposed at a lower part and an upper part of each bending side of the connection body respectively, and two corresponding first column connection holes on a same bending side from the bending sides of the connection body are respectively located at upper and lower sides of a corresponding anti-misplacement horizontal support plate from the anti-misplacement horizontal support plates;
• second column connection holes matching corresponding first column connection holes are disposed on two bending sides of each column respectively;
• after both ends of the connection body are cooperated with the two of the columns in an insertion way, ends of the two of the columns are respectively abutted against corresponding end faces of the anti-misplacement horizontal support plates so as to realize anti-misplacement connection between the two of the columns, and an expansion buckle is disposed in one of the corresponding first column connection holes and one of the corresponding second column connection holes.