The invention relates to a double-sieve self-balancing excavating-harvesting-machine vibration driving device, and belongs to the technical field of agricultural machines. The double-sieve self-balancing excavating-harvesting-machine vibration driving device comprises a front sieve bed and a back sieve bed which are connected back and forth, the front sieve bed and the back sieve bed are arranged in parallel up and down, and the back end of the front sieve bed and the front end of the back sieve bed are overlapped up and down; the front ends of a left side plate and a right side plate of the front sieve bed and the front ends of a left side plate and a right side plate of the back sieve bed are connected with the bottom ends of a pair of front double-connecting rods and the bottom ends of a pair of back double-connecting rods respectively, lifting arms are connected to the back ends of the left side plate and the right side plate of the front sieve bed and the back ends of the left side plate and the right side plate of the back sieve bed respectively, connecting rods are further connected between the hinging points in the middles of the same-side front double-connecting rods and the top ends of the back double-connecting rods respectively, decentration vibration driving arm assemblies are connected to the back ends of the two connecting rods respectively, and a vibration driving shaft is installed between the two decentration vibration driving arm assemblies and further connected with a gearbox through a transmission mechanism. According to the double-sieve self-balancing excavating-harvesting-machine vibration driving device, vibration reduction is achieved through self balancing inside the double sieves, the structure is simple, operation is reliable, and good application and popularization prospects are achieved.