Spraying system for modeling linear cavity

The utility model particularly relates to a spraying system for modeling a linear cavity. The spraying system for modeling the linear cavity comprises a first pipeline, a spraying assembly and a feeding assembly. And the first pipeline is communicated with an external air source. The spraying assembly comprises a spraying device, a first control valve and a second control valve, the first control valve is used for starting or closing the spraying device, and the second control valve is used for adjusting the spraying width of the spraying device. The feeding assembly comprises a first coating tank and a third control valve, a first feeding port of the first coating tank communicates with the spraying device through a second pipeline, and the third control valve is used for controlling the output quantity of the first feeding port. According to the spraying system for the modeling linear cavity, the supply quantity and the spraying width of the paint are controlled, so that the paint can be matched with the ru