Mauritania is one of the main fishing areas of Chinese bottom trawlers. In this study, based on the fishing statistical data of bottom trawlers from Shanghai distant-water fishery company during 2010 to 2015, combined with the satellite remote sensing data such as sea surface temperature (SST) and sea surface height anomaly (SSHA), the method of habitat suitability index including the geometric model and arithmetic average model was used to study the fishing ground of Mauritania bottom trawl fishery. The studies suggest that the fishing seasons are from Jan. to April and from July to December in Mauritania bottom trawling. The monthly suitability index was established based on the relationship between fishing nets and SST, SSHA and sea depth, and there are differences among different months for appropriate scope of marine environment. For AMM model, in the fishing areas in which HSI is greater than 0.6, the percentage of fishing nets and catch reached 76.10% and 78.66%of the total, and the average catch of fishing net gradually increased with the increase of HSI, from 29.37 kg/fishing net with the HIS value of 0-0.2 to 47.20 kg/fishing net with the HIS value of 0.8-1.0. For GMM model, in the fishing areas in which HSI is greater than 0.6,the percentage of fishing nets and catch reached 66.71% and 71.18%of the total, and the monthly average catch of fishing net time did not show a reasonable rule. The results indicated that AMM model is more suitable for forecasting fishing ground in Mauritania bottom trawl fishery.