The invention provides a method for using natural camphor tree seeds as a plant dye for a natural fiber textile. The method comprises the following steps: a) collecting fresh and green camphor tree fruits and cleaning; b) boiling and refining the natural fiber textile, airing, putting into the camphor tree pulp and uniformly coating; c) naturally airing; d) mordanting the dyed natural fiber textile and then taking out, cleaning, and airing or drying, wherein the mordanting treatment conditions are as follows: the adopted mordanting liquid contains ferrous ions, aluminum ions or copper ions; the weight of the mordanting agent is 0.1%-5% of the weight of the natural fiber textile; the bath ratio is 1:20 to 1:50; the temperature is at 20-50 DEG C; the time is 20-40 minutes. The method provided by the invention has the advantages that the technique is simple; the extracting efficiency of the effective components is high; the textile is dyed; the natural plant resources are fully utilized; no chemical additive is added in the whole process; the method is harmless to environment and a human body; the plant dye has excellent compatibility with ecological environment, is biodegradable and is convenient for clean production of the textile.