The invention discloses a private cloud access method and device based on a VPN. The method comprises the steps of obtaining a login request of a client to private cloud, and analyzing the login request to obtain a private cloud account, a private cloud password and a private key; generating a VPN account and a VPN password matching with the private cloud account; carrying out identity verification by employing the VPN account, the VPN password and the private key; establishing connection between the client and a private cloud server through the VPN if the identity verification is successful; and logging in the private cloud server by employing the private cloud account and the private cloud password. Through application of the method and the device, when a user employs cloud service through a VPN server, the VPN can be logged in automatically through the VPN server only by inputting the private cloud account and the private cloud password, and therefore, the login operation is simplified. According to the method provided by the embodiment, the user does not need to store the private key in advance, when the user attempts to log in the private cloud, the newest private key is sent to the client by the VPN server, and therefore, the problem of missing the private key can be avoided.