Restore the self-cleaning effect of mop: the aging tray is easy to accumulate water and mud, which leads to the uncleanness of mop cleaning. Replace the tray of sweeping robot to make mop cleaning more thorough and without residue. Accurate alignment does not block the machine: the long-term worn pallet will have the problem of blocking and dislocation, which will lead to the deviation of the machine's pile returning and the error of pile sticking. The replacement of the base station pallet of the sweeping robot is accurate in size and more stable in pile returning and docking. The aging tray sealing ring is easy to leak water and liquid, which damages the base station fuselage and the ground. Replace the base station tray of the sweeping robot and seal it tightly, so as to eliminate the hidden danger of water seepage and protect the home and equipment. Reduce the probability of machine failure: the tray blockage and water accumulation will increase the burden on the machine motor and waterway. Replace the tray of the base station of the sweeping robot to reduce the equipment loss and effectively reduce the frequency of fault reporting in the base station. The tray of the sweeping robot is a worn-out accessory, and the cost of replacing it alone is low, and it is not necessary to replace the expensive whole machine, so that the working state of the sweeper can be restored at low cost.