Research on improving methods for accuracy of insertion electromagnetic flowmeter. By improving physical structure of coil and improving physical structure of flowmeter to improve measuring precision of flowmeter. Respectively calculate magnetic flux density of traditional flowmeter and improved flowmeter

and numerical coupling of flow field is carried out

electromotive force at the ends of electrodes is obtained

and compared with experimental value

errors are 11. 3 % and 4. 25 %

respectively

rationality of the method is proved.