The invention discloses a control method for preventing electric dust removal caking blockage. The method comprises three aspects of low-temperature combustion phase anti-electric field caking rapping control, low-temperature combustion phase anti-electric field caking dust conveying operation mode control and low-temperature combustion phase anti-electric field caking electric field operation mode control; the anti-electric field caking rapping control is as follows: a first row of operated electric fields contacted with smoke automatically changes anode and cathode rapping periods to set as rapping by 2.5 minutes and stop by 2.5 minutes, and the anode and cathode rapping of other electric fields is set according to normal operations; the anti-electric field caking dust conveying operation mode control is as follows: a dust conveying unit anti-caking function selecting button of each dust conveying unit is provided on a monitoring frame, the units are operated after selecting, operating and confirming, the continuous dust conveying function is achieved during operating, and the dust conveying units are temporarily not operated when the operation stop is selected; and the anti-electric field caking electric field operation mode control is as follows: the secondary current upper limits of all electric fields are set as 150 mA to prevent the discharge condition to intensify the caking possibility.