The invention provides a platinum channel structure which comprises a columned platinum channel main body. The platinum channel structure is characterized by also comprising an external reinforcing rib arranged at the radial periphery of the platinum channel main body. In the platinum channel structure, the external reinforcing rib is arranged at the radial periphery of the platinum channel main body; the external reinforcing rib is completely located at the outer side of the platinum channel, is easy to manufacture, has good strength, and dose not influence the flow of a glass melting liquidin the platinum channel; and most importantly, the evaporated platinum brought by the external reinforcing rib can not enter into the glass melting liquid, thereby avoiding the platinum particle pollution caused by the reinforcing rib.