Faucet anti-freezing device

The utility model discloses a faucet anti-freezing device which comprises a faucet body and a water pipe arranged at one end of the faucet body, a heat preservation barrel made of heat preservation materials is arranged on the water pipe, a piston is arranged in the heat preservation barrel, and a pull rod is arranged on one side of the piston. One end of the pull rod penetrates through the barrel wall of the heat preservation barrel and extends to the outside of the heat preservation barrel, the end, located outside the heat preservation barrel, of the pull rod is fixedly connected with a handle, and a reset spring is arranged on the portion, located between the piston and the inner wall of the heat preservation barrel, of the outer surface of the pull rod in a sleeved mode. Water in the portion, above the baffle, in the water pipe is pumped into the heat preservation barrel, after the piston moves to the maximum moving distance, the pull rod is rotated to make the limiting rod on the pull rod make contact w