Fast automatic water draining device of dehydration sieve

The utility model relates to a fast automatic water draining device of a dehydration sieve. The dehydration sieve comprises a sieve plate and side plates; the sieve plate is fixed on the inner sides of the side plates and is driven to shake by a motor; the dehydration sieve further comprises a bent pipe; a first hole is formed in the side plate above the sieve plate, a second hole is formed in the side plate below the sieve plate, and the first hole and the second hole are connected through the bent pipe. The two holes are formed in the side plates above and below the sieve plate and connected through the bent pipe, so that when the level of liquid material is higher than the holes, separated water can be automatically and quickly drained out of the sieve smoothly through the holes, and water which is almost clear in a sieve chamber of the dehydration sieve can be drained automatically and quickly; therefore, the dehydration efficiency of the dehydration sieve can be improved, the working capacity of the dehydration sieve can be increased, normal working of the dehydration sieve can be ensured, and the tailing dry discharge process of a concentration plant can be carried out smoothly.