本文对海拔５２００ｍ从本重体力劳动４５天的４８名青年劳动前后在现场拍摄两次Ｘ线胸片。结果：心脏横径、心脏长径、心脏面积、心胸比率较初入高原时显著缩小（Ｐ＜０．０１）；肺动脉干横径、肺动脉突度、右肺下动脉横径、右肺下动脉与气管横径比值显著增加（Ｐ＜０．０１）；升主动脉和主动脉结横径、胸宽和肺面积增加或显著增加（Ｐ＜０．０５或Ｐ＜０．０１）。其中２例诊断为高原心脏病，３例诊断为高原肺水肿。 In this paper, 5200m above sea level from the physical labor of 45 young workers before and after 48 young people in the field shooting two X-ray. Results: The diameter of the heart, the diameter of the heart, the area of ​​the heart and the ratio of the heart and chest were significantly reduced (P <0.01), the diameter of the pulmonary artery, the diameter of the pulmonary artery, the diameter of the inferior pulmonary artery, (P <0.01 or P <0.01). The transverse diameter, thoracic width and lung area of ​​ascending aorta and aorta increased or significantly increased (P <0.05 or P <0.01). Two of them were diagnosed with altitude heart disease and three were diagnosed with altitude pulmonary edema.