Indole compound, and preparation method, pharmaceutical composition and use thereof

Provided are an indole compound, and the preparation method, a pharmaceutical composition and a use thereof. In particular, the indole compound has a structure as shown in general formula (I), and can be used in the treatment of diseases associated with α 1 -adrenoceptors, especially urinary diseases such as benign enlarged prostate, uroschesis, and bladder outlet obstruction.