Mine explosion-proof lithium-ion battery trackless rubber tyred-truck is mainly used for transportation of underground materials, crushed stone cement, anchor mesh and anchor bolts, small equipment, etc. In order to enable the vehicle to meet the parameter requirements and stability and reliability requirements under specific working conditions, it is necessary to first do a good job in principle design and reasonably select the system components. After the product is assembled according to the design requirements, it is necessary to arrange reasonable debugging, deal with the problems in the debugging process, and summarize the on-site debugging experience to guide the design of subsequent hydraulic products and make continuous progress, So as to improve the stability and reliability of the whole equipment under specific working environment conditions. Taking the hydraulic system design of WLL-3 material handling vehicle as an example, the system design process includes the design process of explosion-proof design requirements and functional parameter requirements of the hydraulic system. For the key commissioning process after the design is completed and the design optimization after noise failure, it can be used for reference in the design process of other hydraulic systems.