Objective To investigate the clinical value of serum LDH levels in tsutsugamushi patients. Methods We selected 60 patients with tsutsugamushi disease who were enrolled in our hospital from September 2016 to February 2018,including 25 males and 35 females. We recorded the patients' basic conditions,blood tests,liver and kidney function and other laboratory testing indicators;and we detected serum lactate dehydrogenase levels in patients. The correlations in lactate dehydrogenase and platelet number,alanine aminotransferase,and aspartate aminotransferase were analyzed. Results Most patients developed fever,headache,abdominal pain,cough,sputum,and other symptoms. A small number of patients suffered low back pain,disturbance of consciousness,skin mucosal bleeding,and other symptoms;among the 60 patients with tsutsugamushi disease,the contents of serum amblytic dehydrogenase were higher than normal in 52 patients,and the numbers of platelets in 15 patients were lower than normal. The value of alanine aminotransferase was higher than normal in 55 patients,and the value of aspartate aminotransferase was higher than normal in 53 patients;serum LDH and platelet counts （r=-0.929,P<0.01）,alanine aminotransferase （r=0.957,P<0.01） and aspartate aminotransferase （r=0.947,P<0.01） showed positive correlation. Conclusion Lactate dehydrogenase level may be used as an early diagnostic marker for patients with tsutsugamushi disease.