Rainwater and muddy water filtering system on construction site

The utility model belongs to the technical field of water treatment, and discloses a construction site rainwater and muddy water filtering system which comprises a collecting pool used for collecting rainwater and muddy water, the collecting pool is communicated with a reaction tank through a conveying pump and a conveying pipeline, the outlet end of the reaction tank is communicated with the inlet end of a filter press, and a sludge pool is arranged below the filter press. The slurry outlet end of the filter press is communicated with the sludge tank; the device further comprises an adjusting tank, the adjusting tank is divided into a first-stage adjusting tank and a second-stage adjusting tank, the filtrate outlet end of the filter press is communicated with the water inlet of the second-stage adjusting tank, and a liquid outlet is formed in the upper portion of the first-stage adjusting tank. A medicament in the reaction tank is mixed with rain muddy water, the mixture is separated and filtered through the