Sampling device for constructional engineering supervision concrete detection

The invention discloses a sampling device for constructional engineering supervision concrete detection, the sampling device comprises a sampling cylinder, a water tank, a bottom plate and a through hole, the bottom plate is fixedly connected with a collection box, one side of the collection box far away from the bottom plate is provided with an avoidance hole for the sampling cylinder to pass through, the bottom plate is provided with a drainage hole, and the water tank is provided with a water pump; the water tank is fixedly connected with a storage box, the water outlet end of the water pump is communicated with a water outlet pipe, the water outlet pipe is communicated with the storage box, the side, away from the water pump, of the storage box is communicated with a water drainage pipe, and the end, away from the storage box, of the water drainage pipe is communicated with the water tank. A filtering mechanism used for filtering impurities is arranged in the storage box, and a plurality of sets of sealin