Novel amplitude variation system

The invention discloses a novel amplitude variation system which comprises a main pump, a pilot pump, a main valve, a pilot handle, an amplitude variation balance valve and an amplitude variation oil cylinder which are sequentially connected. The main valve is provided with a main reversing valve, a compensation valve, an overflow valve, a first reversing valve and a second reversing valve. When the variable-amplitude falling action is carried out, the rotating speed can be increased according to the speed requirement, and the problem that the speed regulation interval is limited is solved. A user can set the idle current, the maximum current at high speed, the current value change slope and the like according to operation habits, and the system is more user-friendly. For different products, different idle currents can be set in a factory program, so that the interval requirements of different products are met, and meanwhile, the variable-amplitude balance valve unified type is achieved. 本发明公开了一种新型变幅系统，包括依次连接