The work aims to improve the ice-making efficiency of scraping ice slurry machine and study the effect of scraper structure on the heat transfer performance of scraping ice slurry evaporator. The MRF model in Fluent was used to simulate and analyze the heat transfer performance of ice slurry evaporator models with different types of scrapers (near-oval hole scraper, near-rhombus hole scraper and non-hole scraper) established by SolidWorks software. Through the analysis on the heat transfer performance of various types of scrapers at different speed and the temperature distribution of the evaporator near the wall, the scraper surface and the cross section of the rotating fluid domain, it was found that the heat transfer performance of the non-hole scraper was higher than that of the near-rhombus hole scraper and the near-oval hole scraper at the same speed. However, the temperature distribution near the wall of the non-hole scraper was uneven, showing a two-stage differentiation trend, which was very easy to cause ice blockage. The temperature distribution near the wall surface of the evaporator with perforated scraper was relatively uniform, and it was greatly affected by the rotating speed. With the increase of rotating speed, the heat transfer performance was enhanced. However, the heat transfer performance was not significantly improved after the rotating speed was greater than 200 r/min. At the same time, double groups of scrapers were beneficial to improving the heat exchange performance of evaporator. Therefore, under the rotating speed of 200 r/min, the near-rhombus hole scraper has good heat exchange effect and the temperature distribution in the evaporator is more uniform, which is beneficial to the efficient and stable production of ice slurry.