Excavator hydraulic system and excavator

The utility model relates to an excavator, in particular to an excavator hydraulic system and an excavator, and aims to solve the problem that the slicing speed is low when an existing excavator hydraulic system conducts slicing operation, the excavator hydraulic system comprises a main pump and a multi-way valve, and the multi-way valve comprises a movable arm linkage main valve, a bucket rod linkage main valve and a bucket linkage main valve. The oil outlet end of the first logic priority valve is connected with the oil inlet end of a bucket linkage main valve through a first one-way valve, the oil inlet end of the first logic priority valve is connected with the oil outlet end of a second logic priority valve, and the oil inlet end of the second logic priority valve is connected with a main pump. The oil outlet end of the third logic priority valve is connected with the oil inlet end of the movable arm linkage main valve, and the oil inlet end is connected with the main pump; the oil outlet end of the four