The invention relates to a safe hanging piece device for a hidden frame curtain wall, and belongs to the technical fields of curtain walls. The safe hanging piece device comprises a transverse beam, and the transverse beam is fixedly connected with a connection piece through first bolts; the connection piece comprises a connection part and a first hanging connection part of which the cross sectionis in a U shape, and the first hanging connection part is connected with a second hanging connection part; the second hanging connection part comprises a side plate inserted in the opening end of thefirst hanging connection part, and the outer side wall, stretching out of the top of the first hanging connection part, of the side plate is fixedly connected with a top plate; the outer side wall ofthe top plate is fixedly connected with a vertical adhesion plate; a first fixing assembly is arranged between the connection part and the second hanging connection part; and a second fixing assemblyis arranged between the adhesion plate and the first hanging connection part. The safe hanging piece device has the high shock resistance and wind resistance, and the whole stability of the curtain wall is effectively improved.