Sand dredger with dust-proof system

The utility model discloses a sand dredger with a dust-proof system. The sand dredger comprises a machine frame, a sand dredging device, a travelling mechanism and the dust-proof system, wherein the dust-proof system is arranged below the sand dredging device; the sand dredging device is arranged in the machine frame; the travelling mechanism is arranged below the machine frame; the dust-proof system comprises an air blower, an exhaust tube, an air hood, an air adjusting valve, a dust sensor and a controller; the air hood is arranged at the tail end of the exhaust tube; the dust sensor is arranged on the air hood; the air adjusting valve is arranged on the exhaust tube; the air blower is connected with the air hood through the exhaust tube; the dust sensor is connected with the air blower through the controller. The sand dredger capable of extracting raised dust is low in noise, dust-proof, noise-reducing, small in size, simple to operate, low in construction cost, lower in cost, and higher in work efficiency, can be operated easily even by an inexpert operator, and is greatly lower in noise pollution when compared with the conventional sand dredger.