Double-floor vehicle stereo parking device

Provided is a double-floor vehicle stereo parking device including an upper parking platform and a lower parking platform. The lower parking platform is also used as a fixing frame for holding the device and being a counterweight of the device. The upper parking platform is arranged on the double four-bar linkages combined by four support rods and two support arms at the two sides of the device and is arranged on the outer side of the support arms. One ends of the support rods at each side are adjacently arranged on the inner side of the support arms and are hinged to the support arms, and the other ends of the support rods are respectively hinged to the fixing frame. the support rods at the two sides are arranged in a close distance, the support arms and the support rods have enough length to guarantee the upper parking platform on the outer side of the support arms to be free of scratching the vehicles parked on the lower platform during the up-down operation. The upper parking platform remains horizontal d