Abstract: The internal coating can prevent the wax deposition. The device simulating the dynamic wax growth is designed. The study is made on the ratio of inhibiting wax on the different coatings, the temperature differences between crude oil and pipeline wall, rotational velocity and the internal coating affecting the velocity of wax deposition. The test results show that with the time going on, the ratio of inhibiting wax is declined, and when the rotational velocity runs fast, the effect of preventing wax deposition is better. The temperature differences between crude oil and pipeline wall impacts slightly the wax deposition.