The invention relates to an anti-scaling triple-effect evaporation device. The device comprises a feeding pump, a first-effect separator, a first-effect forced circulation pump, a first-effect heat exchanger, a second-effect separator, a second-effect forced circulation pump, a second-effect heat exchanger, a third-effect separator, a third-effect forced circulation pump, a third-effect heat exchanger, a discharging pump, a condenser and a condensed water tank. In the device, a first-effect evaporation unit is composed of the first-effect separator, the first-effect forced circulation pump, the first-effect heat exchanger and a pipeline, a second-effect evaporation unit is composed of the second-effect separator, the second-effect forced circulation pump, the second-effect heat exchanger and a pipeline, and a third-effect evaporation unit is composed of the third-effect separator, the third-effect forced circulation pump, the third-effect heat exchanger and a pipeline. Enough circulation flow velocity and material circulation amount in the three evaporation units are guaranteed through the set of forced circulation pumps, so that the anti-scaling purpose is achieved; and meanwhile,secondary steam of the first-effect evaporation unit and secondary steam of the second-effect evaporation unit are adopted as heat sources of the second-effect evaporation unit and the third-effect evaporation unit respectively, so heat energy is fully utilized.