The invention relates to a fastening device, in particular to a valve connection device. The valve connection device comprises two valve supports, two rotating gears, an upper connection plate, a lower connection plate, an upper closing plate, a lower closing plate, a pinion, two conical connection cylinders, a communicating support, two connection cylinders, two rotating supports, transmission mechanisms and installation nails, wherein the two valve supports, the two rotating gears, the two conical connection cylinders, the two connection cylinders and the two rotating supports are symmetrical in the left-right direction correspondingly. Connection of the device can be sealed through seal rings arranged in an installation groove I, an installation groove II and an installation groove III.Water flow is controlled through the connection cylinders and seal baffles, and then the further seal effect is achieved. The rotating gears are mutually rotated, and then the rotating gears separateor close the upper closing plate and the lower closing plate so as to control closing and communicating of the device. Each installation handle is manually rotated, so that the connection cylinder onthe corresponding side can be rapidly installed through the corresponding installation nails, and each installation handle can simultaneously install the two installation nails on the corresponding side at the same time through the corresponding transmission mechanism.