The invention relates to a test device for water sprinkling distribution performance, which comprises a measuring control system, a water supply system, a water collecting system and a weighing system, wherein the measuring control system consists of a host computer, a programmable logic controller (PLC) control cabinet and a printer; the PLC control cabinet comprises a PLC module unit and an electric circuit formed by connecting a contactor, a thermal relay and an intermediate relay; and a switching switch is arranged on the PLC control cabinet and is used for switching manual and automatic running states. The test device has the advantages of reducing the conversion process, calculating water sprinkling density directly by weight, obtaining weight data directly, and recording, generating and printing reports automatically, along with high measuring accuracy and automaticity; and the device has the characteristics of simple structure, capability of disassembly and moving, low construction cost and wide application range.