The invention provides a press-type sink control unit convenient to install. The press-type sink control unit comprises a switch body, and fixing assemblies, sliding shafts and sliding shaft jacking springs are arranged in the switch body; the lower ends of the fixing assemblies are provided with connection portions used for being detachably connected with connection joints of steel wire sleeves;the lower ends of the sliding shafts are provided with installation sites for connecting steel wire connectors, and the installation sites are used for being detachably with the connecting steel wireconnectors; and at the relative position of the sliding shafts and the jacking springs, the steel wire connector installation sites on the sliding shafts are exposed out of the lower ends of the jacking springs or after the sliding shafts are pressed, the steel wire connector installation sites are exposed out of the lower ends of the jacking springs. The invention further provides a drainage device convenient to install. The press-type sink control unit can be used as a double-open sink control unit or a single-open sink control unit and can be conveniently installed from bottom to top, and apipe fitter or user having general knowledge can easily and conveniently install or detach the press-type sink control unit.