The invention relates to an automatic tea shaping machine and a shaping method of the automatic tea shaping machine. The shaping machine comprises a main frame, a tea pressing mechanism and a wedge frame mechanism, wherein a shaping cabin is arranged on the main frame; the tea pressing mechanism comprises a main pressing plate, a first air cylinder/oil cylinder, a flexible shaping plate and a second air cylinder/oil cylinder; the wedge frame mechanism comprises a left wedge frame, a third air cylinder/oil cylinder, a right wedge frame and a fourth air cylinder/oil cylinder. The shaping machine is used in the shaping method for treating the tea sequentially through the steps of feeding, pre-pressing, shaping, loosing, shaping again and the like to obtain shaped tea. The automatic tea shaping machine disclosed by the invention can be used for simulating a conventional tea shaping technique quite well, the shaped tea is quite similar with the tea shaped by the conventional technique in shape and structure, small destructive effects are caused to the tea during a shaping process, the shaped tea particles are high in compactness, the brewed tea can not rapidly stretch, the color of the tea soup is similar with that of the tea soup of handmade tea, and the tea soup is not bitter either.