Toward-target spraying machine and method for crops in field

The invention belongs to the technical field of modern agriculture equipment and particularly relates to a toward-target spraying machine and method for crops in the field. In the prior art, because the crops in the field are sprayed in a manually or mechanically continuous mode, labor intensity is high, working efficiency is low, pesticide waste is caused, and the environment is polluted. The toward-target spraying machine and method for the crops in the field are designed and mainly used for performing pesticide spraying and foliage dressing on the crops in the field and preventing and treating the nutritional deficiency disease of the crops. Information of the crops in the field is obtained through a machine vision system and input into a control system, and the control system outputs a signal to control mechanisms of the spraying machine to move according to the input speed information and crop line trail information so that spraying nozzles can be turned on instantaneously to spray pesticides when aligni