In order to study the electromagnetic field and inductance gradient characteristics of the augmented electromagnetic launcher, a two-dimensional simulation calculation model of the augmented electromagnetic launcher was established. The finite element method was used to analyze and compare the lamination and plane turn-augmented launcher under the 500 Hz and 1 MA sine current excitation condition. The results show that compared with the conventional electromagnetic launcher, the electromagnetic field and the inductance gradient can be greatly improved by using the augmented electromagnetic launcher. The lower the orbital height of the augmented electromagnetic launcher, the bigger the magnetic field strength and inductance gradient. More rail layers can improve the magnetic field strength and inductance gradient of the electromagnetic launcher.