Balance valve and automobile crane

The invention discloses a balance valve and an automobile crane and relates to the field of engineering machinery. The problem that an existing balance valve is likely to be clamped is solved. The balance valve comprises a valve bush, a main valve element, a main spring, a one-way valve element, a left end cover and a right end cover. The main valve element is arranged in a through hole in the valve bush and can move in the axial direction of the through hole in the valve bush. The left end cover and the right end cover are arranged at the two ends of the valve bush respectively. One end of the main spring abuts against the main valve element, and the other end of the main spring abuts against the right end cover or an auxiliary component fixed to the right end cover. When the main valve element is in a closed state, a gap exists between the main valve element and the right end cover. When the main valve element is in a full open state, the main valve element makes contact with the right end cover. According to the technical scheme, the main valve element is coaxially matched with the valve bush only, the coaxiality is easy to ensure, and the structure of the balance valve is optimized.