This paper expounded the concept and system technology process of leachate recycle technology, and emphatically discussed the framework and design idea in industrial control technology based on the examples. After a quarter of operation of this project, by comparing with garbage power generation without leachate recycle at the same level, it was found that this project had higher automation extent, could efficiently deal with garbage leachate to avoid the second pollution and could not affect power generation efficiency. Finally two usual application results of the coking of boiler scale and the final flue gas were compared and their performance of this project had no coking of the boiler and did not have much impact on flue gas cleaning system.