A nanoparticulate-reinforcing method of gold was presented in order to improve its hardness and hence the wearing quality. And the nanoparticulate-reinforced gold with tungsten was also preliminary investigated. During the high-frequency induction smelting of casting gold plates of 3 mm in thick and with nanotungsten encapsulated in, the hardness number of gold is enhanced by 20.5% for the mass fraction of nanotungsten of 0.12%. Through the analyses of the reinforcing results, it is shown that the further improvement for the dispersion degree of nanotungsten in gold is a key factor, and it is worthy of further studying to improve the smelting ambience of gold and to select some other stable nanoparticulates.