Abstract: The upper reservoir of Jurong Pumped Storage Power Station adopts the anti-seepage measures of asphalt concrete slab around the reservoir and geomembrane at reservoir bottom.It is the first time that a pumped storage power station uses these two measures comprehensively.The design and construction of connecting joints between the two parts are difficult with no reference.Three types of joint connections between asphalt concrete face slab and geomembrane are studied by combining three-dimensional finite element calculation and model test.The result shows that the scheme of setting concrete connection plate at the bottom of asphalt concrete face slab is recommended.While another scheme of direct anchoring geomembrane and asphalt face slab would be an innovative scheme if long term running stability of anchoring paste and asphalt concrete can be testified.