Plate cutting machine with adjustable section angle

The invention discloses a plate cutting machine with an adjustable section angle. The plate cutting machine comprises a cutting table, a cutting device arranged above the cutting table, a vertical plate used for installing the cutting device, an angle adjusting mechanism used for adjusting the cutting angle of the cutting device and a supporting arm mechanism used for connecting the vertical plate and the cutting table, wherein the cutting device comprises a cutting motor and a cutting saw blade, a base of the cutting motor is fixed to the angle adjusting mechanism, and the cutting saw blade is installed on a rotating shaft of the cutting motor; one end face of the vertical plate is connected with a fixing base on the cutting table through the supporting arm mechanism, the other end face of the vertical plate is used for installing the angle adjusting mechanism, the vertical plate can move in the transverse direction of a cutting machine body matched with the cutting table, the vertical plate moves to differe