Four differently processed diets, mash (M), pellet (P), high shear conditioned pellet (HSCP) and high shear conditioned crumble (HSCC) were prepared to evaluate the processing effect on the growth performance and nutrients digestibility in growing pigs. 1. HSCC had the lowest density and HSCP had the highest pellet durability. 2. P-fed pigs had less feed intake compared to HSCC-fed goup but showed the highest ADG and thus the most efficient feed conversion compared to other groups(P$lt;0.05). 3. P and HSCP processing improved protein and fat digestibilities and energy digestibility of P diet was higher than that of M diet (P$lt;0.05). 4. The Number of aerobic bacteria in the diet were drastically (97-98.5%) diminished by the heat treatments like P, HSCP and HSCC processing.