Thermal anchor is one of the key components in ITER magnet supports to maintain the low temperature for superconductor coils. The sufficient attachment of the cooling pipe to the support plates is needed to minimize the risk of helium leakage. Brazing is one of the best choices. Three kinds of special brazing filler, including SnPb brazing filler, Ag-based and Cu-based brazing filler, were developed, which have good thermal conductivity, and toughness for brazing connection of SS 316LN at both room temperature and 77K environment. Some brazing technologies, including induction brazing, vaccum brazing, fire brazing, and arc brazing, have being investigated.