The utility model discloses a slurry oil scale inhibitor heater which comprises a housing (4), a scale inhibitor inlet (1), a preheating group (2), a warming group (3), a strong heating group (5) and a scale inhibitor outlet (6). The slurry oil scale inhibitor heater is characterized in that the scale inhibitor inlet (1), the preheating group (2), the warming group (3), the strong heating group (5) and the scale inhibitor outlet (6) are sequentially connected, the preheating group (2), the warming group (3) and the strong heating group (5) are located in the housing (4), the scale inhibitor inlet (1) and the scale inhibitor outlet (6) are located outside the housing (4), and the preheating group (2), the warming group (3) and the strong heating group (5) are of solenoid coil structures. The slurry oil scale inhibitor heater can quickly achieve scale inhibitor heating through a reasonable structure, enables a preheated injected scale inhibitor to encounter high-temperature slurry oil so as to decrease cavitation phenomena while ensuring scale inhibitor adding continuity and achieves production continuity, loss is reduced, and cost is reduced.