The invention discloses self-vibrating grain drying and sieving equipment. The equipment comprises a shell, a support and a condensation chamber; the support is arranged outside the shell, sliding blocks are fixedly connected to the middle of the outside of the shell, sliding grooves are formed in both sides of the support, and the sliding blocks are connected with the sliding grooves in a sliding mode; connecting plates are arranged at the upper ends of the sliding grooves, the connecting plates are fixedly connected with the support, and floating devices are arranged between the connecting plates and the sliding blocks; a first sieving net and a second sieving net are fixedly connected to the inner side wall of the shell from top to bottom in sequence, a dehumidification pipe is arranged at the upper end of the shell, a vacuum pump is connected to the middle of the dehumidification pipe, one end of the dehumidification pipe is communicated with the interior of the shell, and the other end of the dehumidification pipe is connected with a condensation pipe in the condensation chamber. According to the self-vibrating grain drying and sieving equipment, the structure is simple, the design is reasonable, sieving of grain is completed through self-vibrating of the shell, and the sieving quality and efficiency are improved; meanwhile, drying equipment is added, the functionality of the device is enhanced, and rapid dehumidification can be conducted, so that the drying efficiency is improved.