A drive control device for an electronic expansion valve, comprising: a processing unit for receiving a desired valve body opening signal of the electronic expansion valve and determining a desired valve body opening pulse number according to the desired valve body opening signal, and obtaining a rotary pulse number of a pulse signal required to rotate a motor of the electronic expansion valve based on the desired valve body opening pulse number and a current valve body opening pulse number; a driving signal generating circuit for producing a drive pulse signal of a corresponding pulse number according to the rotary pulse number, under control of the processing unit; and a driving circuit for performing a power amplification on the drive pulse signal and applying it to the motor to rotate the motor; characterized in that the driving signal generating circuit is further arranged for producing, at least one of before and after producing the drive pulse signal, an additional pulse signal of a predetermined pulse number, and for producing a holding current of a predetermined duration time under control of the processing unit; and the driving circuit is further arranged for, at least one of before and after applying the drive pulse signal to the motor, performing a power amplification on the additional pulse signal and applying it to the motor to rotate the motor, and performing a power amplification on the holding current of the predetermined duration time outputted from the driving signal generating circuit and applying it to the motor to produce a torque that achieves positioning a relative position between stator and rotor magnetic fields of the motor. a processing unit for receiving a desired valve body opening signal of the electronic expansion valve and determining a desired valve body opening pulse number according to the desired valve body opening signal, and obtaining a rotary pulse number of a pulse signal required to rotate a motor of the electronic expansion valve based on the desired valve body opening pulse number and a current valve body opening pulse number; a driving signal generating circuit for producing a drive pulse signal of a corresponding pulse number according to the rotary pulse number, under control of the processing unit; and a driving circuit for performing a power amplification on the drive pulse signal and applying it to the motor to rotate the motor; characterized in that the driving signal generating circuit is further arranged for producing, at least one of before and after producing the drive pulse signal, an additional pulse signal of a predetermined pulse number, and for producing a holding current of a predetermined duration time under control of the processing unit; and the driving circuit is further arranged for, at least one of before and after applying the drive pulse signal to the motor, performing a power amplification on the additional pulse signal and applying it to the motor to rotate the motor, and performing a power amplification on the holding current of the predetermined duration time outputted from the driving signal generating circuit and applying it to the motor to produce a torque that achieves positioning a relative position between stator and rotor magnetic fields of the motor.