The utility model discloses a timing electric water heater, which comprises an electric water heater, wherein a time control device is arranged on a power supply circuit of the electric water heater. According to the utility model, as the time control device is arranged on the power supply circuit of an original electric water heater, the power supply of the electric water heater can be automatically cut off after work, so as to avoid power waste caused by continuous and automatic heating of the electric water heater and save a large amount of money; and meanwhile, expenses taken to replace all electric water heaters with novel energy-saving electric water heaters are further avoided, and simple structure and easiness in implementation are realized.