Blowing-type fiber adding device and working method thereof

The invention relates to a blowing-type fiber adding device and a working method thereof, and belongs to the field of oil and gas reservoir yield increasing measures. The blowing-type fiber adding device comprises a cylindrical shell, and a fiber supply system, an air conveying system and a fiber dispersing system are sequentially connected into the shell; the air conveying system comprises an external air blower and an air supply pipeline; and the fiber dispersing system comprises a fiber dispersing cavity, an upper end opening of the fiber dispersing cavity communicates with a conveying channel and the air supply pipeline, a lower end opening of the fiber dispersing cavity is matched with a circular opening in the upper end of a sand mixing tank and fixed to the circular opening, a dispersing umbrella is fixedly arranged under the tail end of the air supply pipeline in the fiber dispersing cavity, the dispersing umbrella is of a seamless integral umbrella-shaped structure, the fiber material is blown to the