Abstract: Trough analyzing common connecting structure of jewellery in the market，this paper classifies the molding and structure of necklaces and generalizes some rational conditions of connecting structure.Considering the common problems during wearing necklaces and bracelets，this paper analyzes the advantages and disadvantages of current connecting structure through the perspectives of molding，ergonomics，multifunction，convenience and so on.And then，regarding the opening and closing structure of bracelets，an innovative idea has been proposed to make up the shortages which are frequently ignored by designers.The new idea could make the brackets and necklaces more beautiful with the practically designed connecting structure.