The invention relates to an oblique insertion type two-stage micro oil gasification burner which comprises an air distribution barrel, a first-stage oil burner body and a second-stage oil gun. The air distribution barrel is mounted in a secondary air duct. The second-stage oil gun is horizontally arranged in the air distribution barrel. The first-stage oil burner body is inserted into the air distribution barrel obliquely. The axis of the insertion direction of the first-stage oil burner body into the air distribution barrel and the axis of the insertion direction of the second-stage oil gun into the air distribution barrel form an acute angle. The flame of the first-stage oil burner body is used for lighting and stabilizing the flame of the second-stage oil gun and heating and gasifying the fuel oil of the second-stage oil gun. Compared with an existing large oil gun burner, multiple expensive components are omitted, the structure is simpler and more reliable, and manufacturing cost is lower. The first-stage oil burner body heats and gasifies the fuel oil of the second-stage oil gun, and original cold oil atomization burning of the second-stage oil gun is converted into hot oil gas burning of the second-stage oil gun. The boundary temperature during burning of the second-stage oil gun can be raised through high-temperature smoke generated during burning of the first-stage oil burner body, and therefore the oblique insertion type two-stage micro oil gasification burner has extremely high burning efficiency.