Rainwater collection and utilization system for construction period of highway reconstruction and extension project

The invention discloses a rainwater collection and utilization system for a construction period of a highway reconstruction and extension project. The rainwater collection and utilization system comprises a water collection pond, a water discharging tank connected to the water collection pond via a first pipeline, a filter device, a purifying pool connected to the water collection pond via a second pipeline, a spraying device connected to the purifying pool via a third pipeline and a control device, wherein the two side walls of the water discharging tank are provided with interception hooks;the filter device includes a hollow fixing shaft, a hollow telescopic shaft, a sieve net and a supporting rod; a fine sand purifying layer is formed in the purifying pool; a water outlet is formed inthe bottom of the purifying pool; the spraying device has a main pipe, a branch pipe and a spraying nozzle; the spraying nozzle has a connection rod and a spraying disc; and the control device is formed by a motor and a contro