Abstract: Objective The Objective of this study was to analyze the incidence of malignant tumors among the insured population in the first division Alar city(hereinafter referred to as Alar city)from 2020 to 2022,and provide reference for the prevention and control of malignant tumors in the local area. Methods The data of malignant tumor incidence from the insured population in Alar city from 2020 to 2022 were collected and sorted out.The crude incidence,age-standardized incidence rate by Chinese standard population(ASIRC)and by World standard population(ASIRW),cumulative rate of 0 to 74 years old,truncated rate of 35 to 64 years old,the incidence sequence and its composition of malignant tumors were analyzed by gender,age and nationality(Han and minority). Results From 2020 to 2022,the insured population in Alar city covered 79.02% of the city′s population.There were 2,778 new malignant tumors.The crude incidence was 276.84/100,000,the ASIRC was 225.64/100,000,the ASIRW was 220.66/100,000,the cumulative rate(0-74 years old)was 23.72%,and the cutoff rate was 394.11/100,000.The incidence indicators of women and Han people were higher than those of men and ethnic minorities.The incidence increased rapidly after 40 years old,with women having higher incidence before age 60 and men having higher incidence after age 60.The top five cancers were lung cancer,thyroid cancer,colorectal cancer,breast cancer and stomach cancer,accounting for 58.42%.Lung cancer and digestive tract tumor were the main tumors in men and Han nationality,while thyroid cancer and breast cancer were relatively prominent in women and ethnic minorities. Conclusion Among the insured population in Alar city,lung cancer,breast cancer,thyroid cancer,and digestive tract cancer are the common tumors,and the incidence of malignant tumors in women is higher.

Key words: Malignant neoplasm, Incidence, Caner spectrum, Alar