The invention relates to a method for building a fire-prevention forest belt in a Chinese fir man-made forest. The method includes the following steps that (1) a line of strawberry trees are planted along a ridge line center line, and the two sides of a ridge line are respectively planted with two lines of schima superba, that is, four lines of schima superba are planted in total; (2) a tourism path is built in the Chinese fir man-made forest or a mountain baseline serves as the tourism path, wherein the tourism path is three meters wide, two lines of landscape tree species such as liriodendron Chinese, mangnolia officinalis, cyclobalanopsis glauca, gingko or privet and oleander which are high in fire resistance are planted from the two sides, 2.5 m away from the center line, of the tourism path till the planted landscape tree species are connected with the schima superba planted in the step (1); (3) a fire-prevention forest belt closed ring is formed, wherein after trees in the step (1) and the step (2) are planted, the periphery of one slope surface of the Chinese fir man-made forest in the mountainous area is surrounded by the schima superba forest, and the fire-prevention forest belt closed ring is formed. By means of the method, the problem that the forest belt width is difficult to control when the fire-prevention forest belt is built is solved theoretically and practically, and the situation that the fire-prevention forest belt is built relaying on experience is changed. The technological method has wide prospects in application and popularization.