The invention discloses a method for increasing the leaching rate of polysaccharide components in dendrobium candidum. The method includes the steps of preprocessing, extraction and post-processing. The method specifically includes the steps that fresh dendrobium candidum strips are cleaned, air-dried and dried for 3.5-4.0 h at the temperature of 95-105 DEG C till the water content is 15-30%, the fresh dendrobium candidum strips are cut into short strips a with the length being 4.0-5.0 cm, a dendrobium candidum pre-extraction material b is obtained after swelling cell disruption is conducted on the short strips a and the short strips a are smashed and screened through a sieve with 100-300 meshes, water with the weight 4-8 times that of the pre-extraction material b of dendrobium candidum is added into the pre-extraction material b, the pre-extraction material is extracted three to four times at the temperature of 80-100 DEG C, each time extraction lasts for 1-3 hours, and extraction solutions are combined, filtered and concentrated to obtain an extract c with the relative density being 1.1-1.3; the extracted extract c is dried, smashed and screened to obtain a target extract. Production equipment investment is little, technological operation is easy, conditions are easy to meet, energy consumption in the preparation process is low, cost is low, processing is convenient, and reagents in use are free of toxin and harm, safe and environmentally friendly. The polysaccharide components in a prepared dendrobium candidum product are easy to leach, and the leaching rate of the polysaccharide components in the dendrobium candidum is increased.