High-resolution record is a recently developed tool for research into pollutants. An undisturbed sedimentary core from Lake Liangzi was analyzed for target compounds that included polycyclic aromatic hydrocarbons (PAHs), organochloro pesticides (OCPs), n-alkanes or aliphatic hydrocarbons, and heavy metals using high resolution. This article focuses only on the PAHs. The analytical results indicated 15 different compounds of PAHs at variable concentrations throughout the sediment core. Fourteen of those compounds were found to be members of the group of PAHs that are classified as harmful. The primary sources of these compounds were established to be anthropogenic, and the heavy industrial city of Wuhan, the capital of Hubei Province, could be a major source of these compounds; deposition from other areas of China was also proven. Transfer and deposition into the lake was shown to be through the atmosphere. The high concentrations at the surface and near surface compare well with both recent sources of these compounds and with the time frame.