Leukemia is divided into acute leukemia and chronic leukemia. Leukemia triple low and high is mainly a decrease in platelets, red blood cells and neutrophils, and an increase in white blood cells. Patients need to note that the diagnosis of leukemia does not rely on routine blood tests alone, because not all patients with leukemia show a decrease in the three lines, and need to do bone marrow aspiration and pathological biopsy as soon as possible to clarify the degree of development of leukemia and the distribution status of each cell. I. Acute leukemia 1. Acute leukemia will show a decrease in platelets, erythrocytes and neutrophils in protozoological examination, which is clinically manifested by anemia, fever, bleeding and tissue infiltration; 2. The number of white blood cells in acute leukemia will increase at a very fast rate, but may also decrease at a violent rate, with the number of platelets showing a significant decrease and neutrophils also decreasing with the decrease in white blood cells. Second, chronic leukemia 1, chronic leukemia pathogenic examination in platelets, red blood cells and neutrophils decreased, leukocytes increased, clinical manifestations are weakness, splenomegaly, low fever, sternal pressure pain, lymph node enlargement, etc.; 2, chronic leukemia early platelet count will be slightly reduced, platelet size will also vary, chronic leukemia is also often accompanied by anemia, anemia when red blood cells and hemoglobin will appear abnormal Decreased, white blood cells are persistently elevated state.