The manual Marshall compactor is one of the core tools used in performance testing of asphalt mixtures within road engineering. Its primary function is to simulate the compaction process of asphalt mixtures during actual construction through manual operation. By applying a specified number of vertical impacts, the instrument forms uniformly sized Marshall specimens. These specimens are subsequently utilized to determine key indicators of asphalt mixtures, including stability, flow value, air voids, and degree of saturation. Through these determinations, the compactor helps evaluate the mixture's density, strength, and high-temperature rutting resistance, thereby providing scientific support for determining the optimal asphalt content, optimizing mixture mix design, and guiding road construction practices.