The utility model provides a liquid medicine spreading vehicle. The liquid medicine spreading vehicle is characterized by being provided with a dynamic arm, wherein the dynamic arm is provided with spray nozzles which are used for spreading liquid medicine which is contained in a liquid medicine tank (10), the dynamic arm comprises a center dynamic arm (22) which is arranged at the front side of a vehicle body (2) and a side dynamic arm (21) which can be switched into a spreading posture or a containing posture, the spreading posture is a stretching posture in the left and right direction of the vehicle body, and the containing posture is an inclination posture with a low front part and a high rear part at the left side and the right side of the vehicle body the side dynamic arm is of a structure capable of freely rotating along a rotating shaft (43), a shaft core of the rotating shaft is formed by the inclination posture with the low front part and the high rear part, a limiting component (45) which is used for limiting the side dynamic arm in the spreading posture to move forwards is arranged, and the left side and the right side of the vehicle body are provided with dynamic arm supports which are used for supporting the side dynamic arm in the containing posture. According to the liquid medicine spreading vehicle provided by the utility model, the dynamic arm can be switched in the containing posture or the spreading posture, and the dynamic arm in the spreading posture or the containing posture is enabled to be in an appropriate posture.
