In electromagnetic launch systems, the contact characteristics between the armature and rails significantly influence launch efficiency and system lifespan. This study employed simulation methods to analyze the spatial distribution features of contact pressure under different interference amounts between the armature and rails. Research findings revealed that interference amount is the primary influencing factor for contact characteristics. Slight increases in front-end and rear-end interference can notably elevate overall contact surface pressure levels. Between the front-end and end interference, the former exhibits a more sensitive and pronounced regulatory effect on contact characteristics. Excessive front-end interference may lead to line contact formation and abrupt pressure concentration at the leading edge of the contact surface during initial contact, causing drastic declines in uniformity and significantly impacting the repeatability of initial contact states. By optimizing armature structural parameters, improvements can be achieved in both pressure distribution uniformity and overall pressure levels on the contact surfaces. The C-type structure demonstrates more stable initial contact performance compared to the A-type configuration.