Faucet fixing device

According to the faucet fixing device, a supporting part is arranged in a T-shaped flange, a rotary positioning part is arranged in the supporting part, the rotary positioning part can rotate clockwise or anticlockwise in the supporting part to stop rotating when colliding with a positioning pin, and a tightening part is installed in a rotating body of the rotary positioning part. A nut of the tightening part rotates clockwise to control a clamping part of the tightening part to unfold and then move upwards to tighten the T-shaped flange to fix the T-shaped flange in a wash basin fixing hole, so that the faucet can be operated and mounted on the front side of the wash basin without being mounted at the bottom of the wash basin by an installer; the fixing device can be installed and fixed only by rotating the tightening nut clockwise, the convenience and firmness of faucet installation are improved, stability is high, the structure is stable, and the problems that when an existing faucet is installed, space is