The utility model discloses an earth connection blocking device, including close locking attachment piece and with close that locking attachment piece is connected close the individual malposed toothstructure, close locking attachment piece and include the annex casing, locate the label code piece on the annex casing and locate the ground wire jack on the annex casing, closing individual malposedtooth and constructing and to construct the casing including closing individual malposed tooth, locate and close individual malposed tooth and construct the fixed fixing base that closes locking attachment piece that is used for on the casing, locate and close individual malposed tooth and construct the label recognizer in the casing, locate and close individual malposed tooth and construct the first air pump in the casing, locate and close a plurality of that individual malposed tooth constructs the casing bottom and close individual malposed tooth and construct the sucking disc, first air pump closes individual malposed tooth with each respectively through gas pipeline and constructs the sucking disc intercommunication, label recognizer, first air pump all are connected with the controller electricity. The utility model has the characteristics of simple structure, convenient high -efficient, the security is high.