The invention provides a blowing-
carding electrical control system and a control method. The blowing-
carding electrical control system comprises a bale 
plucker, an opener, a multi-bin cotton blending 
machine, a scutcher, a cotton conveying pipeline, a 
carding machine, a fan, a 
metal-
fire detector, a dust removal 
machine, sensors and a 
control system and is characterized in that the 
control system comprises a central controller and a human-
machine interface, the sensors comprise a bale 
plucker traveling speed sensor, a picking depth sensor, cotton blending pipeline pressure sensors, cotton blending bin level sensors, a cotton blending machine inclined screen speed sensor, a cotton blending machine flat screen speed sensor and cotton conveying pipeline pressure sensors, the 
signal output ends of the sensors are connected with the 
signal input end of a central controllor, and the controllers of the bale 
plucker, the opener, the multi-bin cotton blending machine and the scutcher are connected with the central controller respectively. The 
automation control of the online detection and the real-time adjustment of the blowing-carding 
system can be achieved, situations such as multi-bin useless running, overlarge fluctuation of cotton storage amount, unsteady rear stage cotton conveying and frequent 
start stop can be avoided, and smooth cotton supply and continuous and even sheet cotton output can be guaranteed.