The invention discloses a trumpet type float fishing device fishing method. A fish luring device is thrown into water, an oxygen charging machine is started, oxygen is compressed into a sleeve of the fish luring device by the oxygen charging machine, fish bait spread out of the sleeve of the fish luring device floats upwards and is blocked by an outer baffle of a bait baffle, a large number of fish bait is stored in a groove formed in the bottom of the bait baffle, part of the fish bait flows out along the side edge of the bait baffle and floats upwards, when a fish comes to eat the upper fish bait, due to the fact that an upgoing fish hook floats, the fish is prone to eating the upgoing fish hook; when the fish eats the fish bait arranged under the bait baffle, the fish is prone to eating a downgoing fish hook.