Abstract: Antibiotic resistance is now a big problem in livestock industry worldwide. Environmental pollution caused by the livestock industry has been becoming increasingly serious. Therefore, finding solutions to solve these problems simultaneously has become more necessary. Charcoal and wood vinegar has been used as fertilizer supplements and water filtration and treatment for humans and animals. This study aims toassess the applicability of charcoal and wood vinegar in prevention of diarrhea and reduction of environmental pollution in pig production. The experiments were conducted on pigs from weaned to finisher. The diets for pig were added different dosage of charcoal and wood vinegar (0.10; 0.20; 0.30% wood vinegar; 0.60; 0.80; 1.00% charcoal and 0.20 wood vinegar + 0.80 charcoal). The concentration of H2S was measured by KITAGAWA-AP.20 kit. Results showed that charcoal and wood vinegar is effective in diarrhea prevention in pigs, reducing the percentage of pig's diarrhea. Moreover, the concentrate of H2S in pig houses decreased in the experiment groups of adding charcoal and wood vinegar (0.30% wood vinegar, 0.60% and 0.80% charcoal, and 0.20% wood vinegar+0.80% charcoal) to diets Therefore, the study results confirm the important roles of both charcoal and wood vinegar used as additives to diet for pigs.