A dynamic scanning detection device combining with the the linear optical image acquisition,the synchronous belt transmission technology and the crusher screen breakage recognition system based on virtual instrument development platform LabVIEW was developed to figure out a rapid and automatic identification method of screening crusher based on characteristics of pulverized material particles.Two kinds of corn and wheat grain were used to verify the effectiveness of the system.Using the average area of a particle as judging index,the average recognition rate of crushed corn screen breakage under the screen pore sizes of 2,4 and 6 mm was 91.25%,82.50% and 96.25%,crushed wheat screen breakage average recognition rate was 93.75%,86.25% and 78.75%,respectively.Using coefficient of variation in particle area as judging index,average recognition rate of crushed corn under the screen pore sizes of 2,4 and 6 mm was 93.75%,98.75% and 97.50%,respectively.The average recognition rate of crushed wheat screen breakage was 93.75%,87.50% and 96.25%,respectively.The results showed that the effect of using the coefficient of area variation as judging index of distinguishing screen breakage recognition was better than that of the average area.The automatic identification system developed can realtime identify grinder broken and screen automatically.