Mixer truck and unloading system thereof

The invention relates to the field of engineering machinery, and discloses a mixer truck and a discharging system.The discharging system comprises a main groove, a rotary driving part, a pitching driving part, a detection assembly and a controller, the rotary driving part can drive the main groove to rotate around the vertical axis, and the pitching driving part can drive the main groove to do pitching motion around the horizontal axis; the detection assembly is used for obtaining real-time position information of the main groove relative to the hopper, and the controller is configured to compare the real-time position information of the main groove with pre-stored ideal working position information after receiving a discharging control instruction, determine the deviation between the real-time position of the main groove and the ideal working position, and send the deviation to the main groove. And controlling the rotation driving piece and the pitching driving piece to work according to the deviation so as