The removing process of inclusions by bubble wake in steel has been studied by using water model and high-speed video recorder and the rule of inclusions removing through bubble wake and the effect of bubble size and inclusion size and concentration on inclusions removing by bubble wake are analyzed. Results show that the bubble wake is favourable to promote the inclusions floating off； there are boundary zone and rising zone in bubble wake； the removing process of inclusions has three sub-processes ： (1 ) inclusions approaching and entering into the boundary zone to produce disturbance

(2) entering into the bubble wake rising zone and (3) inclusions going on rising up or escaping from bubble wake rising zone to float off ； with increasing bubble diameter D

b

and particle concentration C

p

are available to remove inclusions in steel by bubble wake ； the smaller the particle diameter D

p

the easier the inclusions to be remove by bubble wake.