The utility model provides a water storage equipment and preparation water supply equipment for concrete belongs to building construction field, including being used for elasticity water pocket, coupling assembling, pressing means and the support group spare of water storage, the elasticity water pocket have the cavity that is used for the water storage and with the water inlet of this cavity intercommunication, be provided with the delivery port on the wall of elasticity water pocket, delivery port intercommunication cavity, delivery port department is provided with the control valve, coupling assembling is used for installing the elasticity water pocket in support group spare, pressing means includes extrusion ring and second elastic component, and extrusion ring is connected to the oneend of second elastic component, and its other end is installed on support group spare, and the second elastic component makes extrusion ring support tightly on the elasticity water pocket. This waterstorage equipment can convenient and fast in the use provide the water source, the mixture that sand, cement etc. Can be fine is guaranteed to preparation concrete in -process, the concrete preparation is efficient, the material resources of just using manpower sparingly.