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Background: Probiotics and zinc are commonly used and beneficial in pig production. This work aimed to assess the effect of probiotic and zinc on brush-border enzyme activity and histoenzymatic study of the small intestine in pre and post-weaned piglets. Methods: Eighteen LWY piglets were divided equally into control and treatment groups. The piglets were maintained in standard management conditions and were weaned at 28 days of age. The treatment group of piglets fed a mixture of probiotics orally @ 1.25 × 109 CFU/day and zinc @ 2000 ppm/day from birth to 10 days of age. At three different age-groups viz. day 20 (pre-weaning), day 30 (weaning) and day 60 (post-weaning), the animals were sacrificed. For disaccharidase enzyme estimation, the mucosal brush border of the small intestine was scrapped off and the experiment was conducted. For histoenzymatic assay, the small intestine samples were preserved in liquid nitrogen at -196C immediately after sacrifice. They were sectioned at 10μm thickness maintained at -20C and stained for different histochemical staining. The statistical analysis of the data using the appropriate statistical tests was also conducted. Result: The activity of different brush-border enzymes such as maltase, sucrase and lactase was more in the treatment group of piglets. The activity of different histochemical enzymes such as alkaline phosphatase, acid phosphatase, adenosine tri-phosphatase and non-specific esterase was increased in the treated group of piglets. [ABSTRACT FROM AUTHOR]