The invention provides an adhesive spraying device and an adhesive spraying control method; the device comprises a control unit, a photoelectric sensor, an encoder and an adhesive gun manual button for providing signals to the control unit, an adhesive transmission system and a gas circuit control electromagnetic valve controlled by the control unit; the adhesive transmission system and the gas circuit control electromagnetic valve are connected with an adhesive gun by a gas adhesive distributor; the adhesive gun is also connected with an adhesive gun driver controlled by the control unit; the adhesive spraying control method comprises the following steps of: a judgment step in which the control unit judges the package material front edge and the counter of the control unit is started to count the pulse of the encoder when the package material front edge reaches the photoelectric sensor, a calculation step in which the control unit emits an enabling signal to drive the adhesive gun to spray the adhesive when the counted value is equivalent to the threshold, and a judgment step in which the control unit resets the count value of the encoder and waits for the coming of the next package material front edge so as to enter the next working circulation when the control unit completes the spraying to the final adhesive point (the adhesive point with the maximum threshold). The adhesive spraying device has the advantages that the adhesive spraying device is not contacted with the sheet-shaped package material and the adhesive is not exposed and is sanitary, and the like.