Automatic generation control(AGC) technology is used for remote controlling in electric network management. It is considered as an important method to guarantee the balance of electric network. In this paper, the problem of AGC technology based on mixburning coal slurry is analyzed. The corresponding countermeasure is proposed, such as strengthening the coal slurry mixing, improving the drying process, increasing the threshold of main stream pressure, simplifying the runup/rundown signal and the atresia signal, adjusting the control parameter and so on.