Relay electrical contact and preparation method thereof

The invention discloses a relay electrical contact and a preparation method thereof, and belongs to the technical field of relay contact preparation, the relay electrical contact comprises an electrical contact base body, an electrical contact middle layer, an electrical contact electrical contact layer and a protective layer which are sequentially arranged from inside to outside, and the electrical contact base body comprises the following components in percentage by mass: 3%-5% of nano silver, 10%-20% of SnO2 powder, 3%-5% of nano titanium nitride powder and the balance of Ag powder; the electrical contact intermediate layer comprises the following components in percentage by mass: 95% of Ni powder and 5% of Ag powder; the electrical contact layer of the electrical contact comprises the following components in percentage by mass: 85%-89% of nano Pd powder and 11%-15% of Ag powder; and the protective layer comprises the following components in percentage by mass: 91% of Au and 9% of Ag. According to the inve