  The simulation and analysis for electron multipacting phenomenon in low
{\beta} spoke superconducting cavity in ADS proton accelerator are proposed.
Using both CST and Track3P codes, the electron multipacting calculation for
{\beta} = 0.12 spoke superconducting cavity is implemented. The methods of
multipacting calculation on both codes are studied and described. With the
comparison between the calculation results and the cavity vertical test
results, the accuracy and reliability of different code on calculating
multipacting are analyzed. Multipacting calculation can help to understand the
result of vertical test and also can help to do the optimation in cavity
design.
