1. Demonstration control experiment of hydraulic loading machinery 1) For loading operation, after the bucket is loaded, the rocker cylinder extends to make the bucket reverse and the boom lifts; 2) Unloading operation, bucket unloading (the rocker arm retracts to make the bucket turn), and the boom descends. 2. Programmable controller (PLC) electrical control experiment: machine-electric-hydraulic integrated control experiment. 1) PLC instruction programming, ladder diagram programming learning; 2) Learning and using PLC programming software; 3) Communication and online debugging between PLC and computer; 4) The application of PLC in hydraulic drive control and the optimization of the control scheme.