Objective To explore the effect of biological resonance technique in the detection and treatment of milk protein induced allergic diarrhea in infants .Methods A total of 60 infants with protein allergic diarrhea were detected by bio-resonance technique of German -made Bikang Biotherapeutic Instrument .The statistical bio-reso-nance technique was used to detect the distribution of allergy in infantile milk allergic diarrhea and treatment effect . Results Bio-resonance technique for detection of infantile milk protein allergic diarrhea ,the first six allergies were milk,milk protein,fish mixture,normal intestinal flora,mite and breast milk.The total effective rate was 95.00％,the effective rate was 95.83％ in the female group and 94.44％ in the male group,the difference was not statistically significant(χ2 =0.142,P>0.05).There was no significant difference between the 9th and 6th month group(χ2 =0.671,P >0.05).After treatment for 1 month,the follow -up showed no recurrence.Conclusion Resonance technology is one of the best technique to detect and treat allergic diarrhea in infants and young children , which is suitable for clinical use .