Abstract: Neutral beam injector for EAST is designed to deliver deuterium beams with a power of 2 to 4 MW at an energy of 50 to 80 keV into the plasma with a beam dimension of 12cm x 48cm. Considering the beam generation and transmission, a columniform beam-line of250cm x 400cm is designed with a neutralizer, ion dump, calorimeter, bending magnet and cryopanels. The arrangement of the internal elements for the beam-line is reported. A rectangular sleeve coupled to the ion source is employed as the neutralizer. At the downstream of the neutralizer, a dipole magnet separates the residual ions from the beam passage with a reflection radius of 42 cm for the full energy particles. The calorimeter and the ion dump serve as high heat flux components, which will work as thermal inertia targets in the first phase of operation.