Initial rainwater automatic collecting device and using method thereof

The invention discloses an automatic initial rainwater collection device which comprises a rainwater distribution well (4), a rainwater collection channel (1), a later rainwater channel (3), an initial rainwater collection pool (5) and an initial rainwater pipe (8), the rainwater collection channel (1) and the later rainwater channel (3) are communicated with the rainwater distribution well (4), and the initial rainwater pipe (8) is communicated with the initial rainwater collection pool (5). The rainwater diversion well (4) is communicated with the initial rainwater collection pool (5) through the initial rainwater pipe (8); a flap valve (9) capable of being opened towards the initial rainwater collecting pool (5) is arranged on the initial rainwater pipe (8). According to the automatic initial rainwater collecting device, the flap valve is used for replacing a floating ball valve and a floating ball chamber, and therefore the problem that the floating ball chamber is blocked is solved. 本发明公开了一种初期雨水自动收集装置，所述