The invention discloses a detachable multifunctional recumbent bicycle. The a detachable multifunctional recumbent bicycle includes a folding frame; the front end of the back suspension support of the folding frame is provided with a transverse shaft; the transverse shaft is connected to one end of a front shaft; the transverse shaft is provided with a first seat fixing rack; a position corresponding to an installation hole of the first seat fixing rack, of the front shaft is provided with an installation block; the front shaft is provided with a first reserved quick detachment opening; the front shaft is provided with a second reserved quick detachment opening in front of the first reserved quick detachment opening; the other end of the front shaft is provided with a front rack; the front rack is provided with a front crankset support; the front crankset support is provided with a first treadle; and the front rack is provided with a third reserved quick detachment opening in the front of the front crankset support. The frame is foldable, the distance between a long shaft and a short shaft is inclined to form a forward three-wheel multifunctional recumbent bicycle, a reverse three-wheel multifunctional recumbent bicycle, a two-wheel multifunctional recumbent bicycle, and a four-wheel multifunctional recumbent bicycle; the problem that the bicycle body is not stable and is prone to turnover due to bending of the forward three-wheel multifunctional recumbent bicycle can be solved; through the reserved quick detachment openings, a man or two man can ride on the bicycle; the use space of the recumbent bicycle is expanded; and the user experience can be improved.