The invention discloses a variable amplitude spraying machine. The spraying machine comprises a handcart with travelling wheels, a liquid medicine tank, a petrol engine, a water pump, a vertical bracket, a horizontal bracket, spraying devices, a lifting device and recycling devices, wherein the liquid medicine tank, petrol engine and water pump are arranged on the chassis of the handcart, the vertical bracket is arranged on the front end of the handcart, the horizontal bracket is connected with the vertical bracket through a slider, the horizontal bracket is connected with a plurality of spraying devices and recycling devices, the spraying devices and the recycling devices are arranged symmetrically, the horizontal strut in the middle of each two adjacent spraying devices is provided witha hollow conical spray head, and the lifting device is connected with the horizontal strut. The spraying machine of the invention can be adjusted according to the height and line spacing of grapes orother corps growing on trellis, and collect the liquid medicine which can not hit grapes and blow in air and filtrate the collected liquid medicine for reuse so as to increase the utilization of the pesticides and reduce the damage of chemical pesticides to the personnel safety of operators and the environmental pollution.