Device for preventing rockfall and collecting rainwater for irrigation and construction method thereof

The invention discloses an anti-rockfall rainwater collection irrigation device which comprises a connecting device, a blocking device is arranged at the top of the connecting device, the blocking device comprises an arc-shaped plate, a water leakage groove is formed in the wall of the arc-shaped plate, a base is arranged outside the water leakage groove, and a concave plate is fixedly connected to the lower surface of the base. The invention relates to the technical field of rockfall collection and rainwater irrigation, by arranging a blocking device, broken stones at the top of a slope protection roll down and roll along the outer surface of an arc-shaped plate after passing through the arc-shaped plate, kinetic energy is converted into gravitational potential energy by increasing the height of the top of the arc-shaped plate, and then the slope protection device is used for collecting the rockfall and irrigating the rainwater. When it rains outside, rainwater downwards rolls down along the arc shape of the