The utility model provides a test device of test crude oil, include: rotatory refrigerating plant, rotor and be used for bearing the container of crude oil. Wherein, the rotor includes link and rotatory end, and the link and the rotatory refrigerating plant of rotor are connected, and rotatory refrigerating plant is used for the rotation and the temperature of the rotatory end of control, and the container is arranged in to rotatory end. The utility model provides a link of test device of test crude oil through with the rotor is connected with rotatory refrigerating plant, and the container is arranged in to rotatory end, has realized simply accurately measuring crude oil wax control rate, for the personnel that are correlated with evaluate this medicament the wax control effect, carry out the medicament selection and provide the reference.