The poor mixing in purification process is a serious problem which cannot be avoided in treatment of zinc-containing solid waste. Here, to enhance the purification efficiency of zinc-containing solid waste treatment reactor, multi-blade combined (MBC) paddles are compared with four straight-blade paddles which are traditionally chosen by industry. This study simulated and explored the flow field characteristics and purification effects, further proposes the unit ion purification energy (UIPE) as a criterion for energy consumption and effect evaluation. The results show that MBC enhances axial flow by 12.56 %. Meanwhile it effectively inhibits the growth of isolated mixing region which scope has decreased by 56.25%. MBC increases the purification rate by 24.79% while the UIPE decreases by 29.45% compared with others. MBC has exhibited axial velocity improvement effect. The improvement increases collisions between particles, which increased rate of substitution reactions. MBC can solve the problem in zinc-containing solid waste treatment.