Abstract: As the light source to provide multi-time radiography, multi-pulse linear induction accelerator (LIA) needs each of its accelerating module to produce several induction pulses in ~μs, with ~100 ns pulse width and ~200 kV pulse voltage. Two kinds of multi-pulse accelerating modules are introduced and compared in this paper, one is based on pulse forming line (PFL) parallel connection method, the other is based on pulse transmission line (PTL) time-delay method. A new design of double-pulse acceleration module is advanced, and the principle experiments' results are discussed.