The defects existing in material level measurement equipment of current direct blow double inlet and outlet tube mill were analyzed.Based on mass test data

the internal relationship between material level and main parameters of coal pulverizer was known.A two digit simulation calculation mode was designed and a simulating material level reflecting coal storage condition of coal mill big pot was got after calculation.After level automation was put into operation

the stable disturbance

fixed value disturbance

and AGC variable load test were checked.the results indicated that each index satisfied the unit operation requests.After one year’s operation

it achieved good effect.