A double lift force ducted vertical take-off and landing aircraft based on a tilt duct, comprising an aircraft body (10), two wings (9), N tilt ducted fans (1, 2), two lift force ducted fans (5, 7), and two duct covers (6, 13), N being an even number. The wings (9) are oppositely arranged on either side of the rear middle portion of the aircraft body (10), and each wing (9) is formed by stretching outwards from the side portion. The N tilt ducted fans (1, 2) are divided into N/2 groups. Each group of tilt ducted fans (1, 2) are oppositely mounted on either side of the aircraft body (10), and each tilt ducted fan (1, 2) is rotatably connected to the aircraft body (10) by means of a corresponding connecting member. The two lift force ducted fans (5, 7) are embeddedly mounted in the two wings (9). The two duct covers (6, 13) are mounted on the upper portions of the two lift force ducted fans (5, 7) and can be opened or closed.