Micro-negative pressure ignition adjusting device of sintering machine and sintering machine

The invention discloses a sintering machine micro-negative pressure ignition adjusting device and a sintering machine. The sintering machine micro-negative pressure ignition adjusting device comprises a first air pipe, a second air pipe and a third air pipe, the second air pipe is connected with the fan header pipe; the pressure regulating valve is arranged between the first air pipe and the second air pipe; the pressure regulating valve comprises a valve body connected with the first air pipe and the second air pipe, a valve element movably arranged in the valve body, a valve element matching part capable of being matched with the valve element in a sealing mode and a valve element movement driving unit driving the valve element to move linearly. The valve element movement driving unit controls the valve element to be located at different positions in the valve body so as to adjust the pressure in the air box. The invention can realize no blocking, no leakage, no resistance, low wind speed and safe and relia