Anti-scald constant-temperature faucet

A plastic body set comprises an outer plastic body and an inner plastic body, the outer plastic body is fixedly connected into a metal shell, and a heat insulation gap is formed between the outer plastic body and the metal shell. The second assembly cavity can be communicated with the first water inlet passing channel and the mixed water passing channel at the same time, and the first assembly cavity can be communicated with the first water outlet passing channel and the second water outlet passing channel at the same time. The plastic inner body is fixedly connected in the second assembly cavity and is provided with a third assembly cavity and an eccentric plug communicated with the third assembly cavity, and the eccentric plug is inserted into one end of the mixed water passing channel in a sealed mode. The plastic body set only comprises two parts, namely the outer plastic body and the inner plastic body, and the same water passing function can be achieved with few parts by reasonably configuring the struc