Margarya melanioidesis endemic to the plateau lakes of Yunnan Province. In the early 1990s, it was the dominant benthicfauna species in the Lake Erhai basin. However, it is now facing extinction To further understand the feasibility of M.melanioides' restoration in Ottelia acuminate ponds within the Erhai basin from a feeding ecology view, the feeding ecology of the endangered snail towards four typical attached algae in the Erhai basin was studied using a small scale cultivation experiment. The algae were Navicula sp., Nitzschia sp., Planktothrixmougeotii, and Scenedesmus quadricauda. The feeding results showed that M. melanioides preferred to feed on Navicula.sp. under the same experiment conditions. The ingestion rate for the algae was as followed the order:Navicula sp. Nitzschia sp. Planktothrixmougeotii Scenedesmus quadricauda. The effects of the temperature, illumination, and dissolved oxygen(DO) on the ingestion rate of M.melanioides that weighed about 30 grams was studied by feedingthem Navicula sp. The results showed that all these factors had a significant impact on M. melanioides' feeding. A temperature rise from 10℃ to 25℃ increased the ingestion rate increased until it reached a maximum(2.19± 0.16)mg ind^-1 d^-1(milligrams algae per individual per day) at 25℃.It started to decrease when the temperature was higher than 25℃. M.melanioides can normally act and eat under experiment illuminations from 0 lx to 10000 lx. The optimal illumination conditions were between 1000 lx and 2000 lx, and within this range the ingestion rate can reached above 3.0mg ind^-1 d^-1. M. melanioides' feeding behavior was active when the DO was above 3.6mg/L, but virtually stopped when the DO was below 1.0 mg/L. The effect of M.melanioides' size on the ingestion rate was studied and the results showed a significant negative correlation(P <0.05) between them. The ingestion rate reached above 14.0 mg/ind^-1 d^-1.when M.melanioides' weight was within the range of 5 to 10 g, and was below 6.3 mg/ind^-1 d^-1.when the weight was above 20 grams.Field investigations were carried out in Ottelia acuminate ponds located in the northern part of the Erhai basin. The environmental variables measured included DO, pH, illumination, temperature, aquatic biological structures etc. The results showed that DO was above 7.6 mg/L which meant that it had reached saturation levels, the pH was about 8.2, and the temperature was above 10℃all year round(It exceeded 20℃ for almost half the year. It is worth mentioning that there were large amounts of Navicula sp., which indicated that the environment was suitable for M.melanioides. Ottelia acuminate wetland can therefore be used as a habitat for M.melanioides population restoration.