A mop trolley with a central mop sprayer and mop rest including a wheeled U-shaped base and a continuous recess therein, a pair of removable buckets atop the recess, and an upright support between the buckets. A manually-operable liquid pump assembly between the buckets includes a pump housing containing a pump operated by a pump lever which pumps liquid from an inlet hose in one bucket through a water outlet tube having liquid jet dispensers therealong which, in turn, spray onto a mop cleaning end resting on a mesh tray positioned between the pump housing and the upright support. The mesh tray has openings through which the water used to clean the mop is dispensed into the other bucket. A mop rest hook, disposed on an underside of a cross-member support that supports the liquid jet dispensers, supports a handle of the mop situated on the mesh tray.