Sinospelaeobdella wulingensis, the type species of Sinospelaeobdella recently published, is a new unique species of troglobites exclusively bloodsucking cave-dwelling bats. From August 2021 to August 2022, a monthly investigation was carried out on the population size, spatial distribution, microhabitat characteristics and population dynamic impact factors of this species in three caves of Xiangxi Prefecture, and the relevant data were analyzed by method of Grey System Correlation Analysis, etc. The main results were as follows: ①A total of 3575 individuals and 318 fresh cocoons were recorded in the annual cycle; ②These cave leeches could mate and lay cocoons all year round, and there was no obvious reproduction season, inspite of the larval number being more from February to April (accounting for 59.42% of all the larvals observed), the subadult number doing from May to July (33.08% of the subadults), and the adult number doing from August to November (64.07% of the adults); ③Cocoons incubation period was about 3 months, and the peaks for cocoon production and hatching out were mainly during September to October and during January to February of next year, respectively; ④This species