Coarse sand river bed deep sampling system for sandy river

The utility model discloses a coarse sand river bed deep sampling system for sandy rivers. The coarse sand river bed deep sampling system comprises underwater sampling equipment, wherein the underwater sampling equipment comprises a vibration tamping mechanism, a support frame, a holder, a drilling mechanism and an underwater communication cable; the support frame comprises a base and four support feet; the drilling mechanism comprises a drilling motor, a drilling tube and a sampling tube; the drilling mechanism is mounted on the holder; the vibration tamping mechanism is mounted on the holder; the holder is connected with the base of the support frame through a spiral mechanism; the spiral mechanism is driven by a servo motor. According to the coarse sand river bed deep sampling system, the support feet of the support frame are pricked into the mud layer at the bottom of a river in a vibration tamping mode, the overall stability of the drilling process is ensured by the gravity of the sampling equipment self