Novel flat tube and micro-channel heat exchanger thereof

The utility model discloses a novel flat tube and a micro-channel heat exchanger of the novel flat tube. The flat tube comprises a flat tube body, wherein two ends of the flat tube are inserted in a collecting tube, a multihole flow channel is arranged in an inner cavity of the flat tube body, and a mixing cavity which is communicated with the multihole flow channel is arranged at the front end of the flat tube. Cooling agent flown out of the collecting tube is evenly mixed in the mixing cavity and then flows into the multihole flow channel. According to the novel flat tube and the micro-channel heat exchanger of the novel flat tube, the mixing cavity is arranged at the front end of the flat tube with the micro-channel heat exchanger, the cooling agent flowing into the flat tube can be evenly mixed in the mixing cavity and then flows into the multihole flow channel of the micro-channel heat exchanger, so the flow of the cooling agent is evenly distributed in each flow channel of the flat tube, and the heat tr