The invention relates to a 
surface runoff uniform arrangement device and an arrangement application method for complicated small catchment areas. The 
surface runoff uniform arrangement device is characterized in that a double outside-wire conversion connector is connected with a 
water diversion tee joint and a flow regulating valve; a water meter is connected with the flow regulating valve and a water division tee joint; the other two ends of the water division tee joint are connected with outside-wire conversion connectors; the outside-wire conversion connectors and a porous water division 
pipe are fused for forming an arrangement 
pipe; the end head of the porous water division 
pipe is provided with a chock plug; the porous water division pipe is uniformly distributed with outlet holes; a pipeline 
levelling instrument is attached to the water division tee joint. The arraignment application method comprises the following steps of horizontally dividing a 
terrain into a plurality of water distribution units with identical slope aspects in the horizontal direction; recording a horizontal width, marking a center position and arranging a 
water supply pipe water diversion outlet. The 
water diversion tee joint of the 
surface runoff uniform arrangement device is connected with the 
water supply pipe water diversion outlet, and the eyelets of the water outlet holes are adjusted to face upwards; a 
water supply system is started, the flow is regulated, and the water supply 
system is started. According to the surface runoff uniform arrangement device and the arrangement application method for the complicated small catchment areas, controllable surface runoffs can be uniformly arranged in the complicated small catchment areas; the surface runoff uniform arrangement device has the advantages of simple structure, convenience in installation, easiness in operation and stable performance and is provided with a debugging 
system.