The invention provides a water pipe pre-embedded extruder barrel and an extruder. The extruder barrel includes a barrel body, a steel jacket is inlaid in the barrel body, also the barrel body is internally pre-embedded with a spiral water pipe, the spiral water pipe is sleeved outside the steel jacket, and the encircling shape of the spiral water pipe is consistent with the shape of the steel jacket. One end of the spiral water pipe stretches out of the barrel body to form a water inlet, and the other end of the spiral water pipe stretches out of the barrel body to form a water outlet. According to the invention, when the temperature of the material in the steel jacket is too high, water is introduced into the spiral water pipe to cool the steel jacket. As the spiral water pipe circles outside the steel jacket, water can take away equal heat from the front, middle and rear part inside the barrel body after entering the barrel body, the heat displaced in the barrel body is almost the same, thus ensuring the material inside consistent temperature. And the temperature can be controlled precisely.