Lung squamous carcinoma from early stage to late stage will not develop into late stage if it is found in time and treated actively, but if it is not treated in time, it may enter into late stage in 3-6 months, which needs to be analyzed according to the patient’s body, treatment and so on. The time from early stage to late stage of squamous lung cancer is not completely fixed, and it will be affected by many factors such as treatment, physical condition and so on. If patients can find out the disease in time at early stage, through radical surgery, radiotherapy, chemotherapy and other treatments, they can be cured and will not enter into the late stage. However, if the disease is not detected in time, coupled with poor physical condition, the disease will develop faster, and may enter the advanced stage in 3-6 months; if the health is better or the treatment is active, the development will be slower, and it will take about 1 year.