Rainwater collection system for planting vegetables on roof of house

The rainwater collection system comprises a rainwater drainage pipe, a water interception barrel, a settling box and a water storage pool, the rainwater drainage pipe is provided with a vertical portion and a horizontal portion, the vertical portion is communicated with the horizontal portion through an elbow, the upper portion of the water interception barrel is connected with the lower portion of the horizontal portion, and a water pump is arranged on the lower portion of the water interception barrel. A water inlet of the water pump is communicated with the water interception barrel, a water outlet of the water pump is communicated with the settling tank, the settling tank is installed on one side of the water storage tank, and the upper portion of one side of the settling tank is communicated with the interior of the water storage tank. According to the rainwater collection system, by using the water interception barrel, the rainwater in the rainwater drainage pipe located at the top of the building is pu