Abstract: This paper describes the evaluation on the property of organic coating for the gathering pipeline of Shengli Oilfield. By means of traditional coupon test, an alternating impedance technique is used to make field test to the property of flake glass-filled coatings marked in H87, HT515 and EP67, and laboratory evaluation is made too. Electrochemistry test results show that the protection property of the coatings tends to descend with the prolongation of the test period; and within an equal test time, an optimum protection property appears to be the coating of EP67, H87 and HT515 in succession.