The invention relates to a high-speed flexographic printing machine for thin films, which comprises a base, an n-shaped vertical column set and a control circuit. The n-shaped vertical column set fixed on the base is composed of a left vertical column, a right vertical column and a beam fixed between the left vertical column and the right vertical column. An unwinding roller mechanism is disposed on the left vertical column. A winding roller mechanism is disposed on the right vertical column. A first color printing mechanism, a second color printing mechanism and a first heating tank are sequentially disposed on the left vertical column, and a first transfer press roller and a first transfer ink roller are disposed between the first color printing mechanism and the second color printing mechanism. A third color printing mechanism, a fourth color printing mechanism and a second heating tank are sequentially disposed on the right vertical column, a second transfer press roller and a second transfer ink roller are disposed between the third color printing mechanism and the fourth color printing mechanism, and a heating device is disposed on the beam. The high-speed flexographic printing machine for thin films is novel in appearance, reasonable in mechanism design, simple in operation, long in service life and easy in maintenance.