Carbon dioxide fracturing well bottom sand mulling reinforcing device and using method thereof

The invention relates to a carbon dioxide fracturing well bottom sand mulling enhancing device and a using method thereof. Carbon dioxide sand-carrying fluid flows in from an upper connector, one part of the carbon dioxide sand-carrying fluid enters from a first-stage circular throttling opening, and the other part of the carbon dioxide sand-carrying fluid enters from a first small-aperture spraying hole; carbon dioxide sand-carrying fluid entering from the first-stage circular throttling opening impacts the bottom of the cavity after flowing in; on one hand, carbon dioxide sand-carrying fluid entering through jet flow of the first small-hole-diameter spraying holes downwards flows to the bottom of the cavity along the arc-shaped groove track, and hedging and flowing interference are generated between the carbon dioxide sand-carrying fluid and the carbon dioxide sand-carrying fluid entering through the first-stage circular throttling opening and impacting the bottom of the cavity; in the ...