Abstract: Based on the data of the systematic investigation taken from the cultural houses of the Jelly fungus (Tremella fusciformis) in Gutian county, Fujian province, in 1988. The population dynamics and the population distribution patterns of Stferoptes fusarii were tested. The results showed that the numbers of the mite did not differ gratly among the different layers of the same shelf and differ remarkably among the same layers of the different shelf. The dynamica cunves of the population all belonged to postpeak type. The spatial distribution patterns of Siteroptes fusarii were all aggregation ones. The dispersal rate tested was 3.54 cm/hr 6 hours late after releasing. The migration hardly stoped 24 hours late after the mite releasing.