Pulmonary texture is the radial strip of shadow extending from the lung gates to the outer periphery of the lung field seen on chest imaging. It is mainly composed of pulmonary arteries, pulmonary veins, bronchial tubes and lymphatic vessels. 2, vascular pulmonary texture increase: lung texture is coarse, from the lung door to the lung to maintain the characteristics of the blood vessel travel, often accompanied by the performance of heart enlargement, mainly seen in wind heart disease, precordial disease, etc. Yao Shuyang, Department of Thoracic Surgery, Xuanwu Hospital, Capital Medical University 3, lymphatic lung texture increase: lung texture in the two lungs in a slender mesh, commonly seen in pneumoconiosis, cancerous lymphangitis, etc. 4.Smoking pulmonary texture increase: it shows increased texture in both lungs, but the travel is normal, mainly due to charcoal end sedimentation caused by long-term smoking. 5, physiological lung texture increase: mainly seen in the elderly and obese people. The former is due to the relatively rich interstitial lung mass in the elderly, thus showing increased lung texture on the X-ray chest film; the latter is due to the obesity of the subject and increased subcutaneous fat, resulting in increased X-ray absorption, thus causing the illusion of increased lung texture on the chest film. X-ray imaging is a complex process. It is not only related to the density and thickness of human tissues, but also depends on the X-ray dose, X-ray penetration, X-ray projection angle and distance, the photographic effect of the film, the efficacy of the film washing solution, temperature and time, etc. Changes in any one of these processes can affect the quality of the radiographs and cause increased lung texture. In addition, inexperienced examiners can easily misrepresent a normal chest radiograph as an increase in lung texture. As can be seen, there are many causes of increased lung texture, which can be pathologic, physiologic or technical. Generally speaking, reporting increased lung texture in isolation has little total clinical value. Only by carefully analyzing the nature of increased pulmonary texture and combining it with other X-ray manifestations and clinical conditions and technical conditions can a correct conclusion be drawn.