The invention relates to a uniformly-heated and convenient-to-choose intelligent grain dryer, which comprises a drying tank, a hot air chamber, an air inlet pipe, an air outlet pipe, a hopper, a discharge pipe, a controller and a plurality of supporting legs, wherein an air guide mechanism is arranged in the hot air chamber, a mesh plate and an agitating mechanism are arranged in the drying tank,the agitating mechanism comprises a first motor, a first driving shaft, a rotary shaft, a transmission assembly and two agitating plates, the transmission assembly comprises a transmission unit, a reciprocating unit, a fixed plate and two collars, and the air guide mechanism comprises an air guide assembly, a plurality of electric heating wires and two switching assemblies. The uniformly-heated and convenient-to-choose intelligent grain dryer can use different specifications of electric heating wires by means of the air guide mechanism, so that the temperature of heated air can be convenientlycontrolled, and thereby the dryer can dry different types of grains; in addition, by means of the agitating mechanism, the agitating plates can reciprocate up and down in the process of rotation, consequently, piled grain can be thoroughly uniformly heated, the drying effect is improved, and the practicability of the dryer is increased.