Abstract: In the experiments 36 threeway crossbred [ Duroc×( Landrace×Yorkshire ) ] piglets weaned at 28 days, average initial weight 5.22±0.89 kg, randomly divided into 2 groups, namely active ovalbumin group ( AEWP group ) and control group, each group had 3 replicates and with 6 piglets in it. Control group feeding basal diets, the AEWP group treated with active ovalbumin at 10 ml level to each piglet for 10 days ( from 5 days before weaning to 5 days after weaning ). The experiments was designed to study the effects of active ovalbumin on growth performance, diarrhea rate and pH value of different intestines for piglets. The results indicated the active ovalbumin could increased average daily gain ( ADG ), feed intake and growth for piglets, growth performance had improved significantly. Secondly the active ovalbumin had better advantage on phase increase weight and trend on heighten growth rate, had preferable effect for the alimentary tract diseases of piglets, could heighten livability for weaned piglets, vast scale decline in diarrhea rate and delay diarrhea relative to control group. So it was concluded the active ovalbumin could help to improve performance and reduce diarrhae rate for early weaned piglets，had effect to fall the pH value of intestinal tract.

Key words: active ovalbumin; performance; diarrhea rate; weanling piglets