A method for automatic login between multiple websites, the method comprising: receiving, at a server of a first website and from a user-side client, a visit request for a target page on a second website, wherein the second website comprises a website on which a service resource to be visited by a user is located; determining, by the server of the first website, whether the service resource is a local service resource of the first website or not, wherein a local service resource of the first website comprises a service resource with corresponding login domain configuration information that is maintained by the server of the first website; in response to determining that the service resource of the second website is not a local service resource, determining, by the server of the first website and based on a pre-stored mapping, a URL address of the target page on the second website; querying a login status of a user's first login account on the first website to determine whether the first login account is in a logged-in state or not; in response to determining that the first login account is in a logged-in state, generating an automatic login token based on a token generation rule agreed by the second website; creating a first automatic login link that comprises a URL address of an automatic login portal of the second website and the automatic login token; sending the first automatic login link to the client, so that the client visits the first automatic login link to send the visit request for the target page that comprises the automatic login token to the automatic login portal of the second website; and after validating, by a server of the second website, the automatic login token, the server of the second website i) authorizes the client to perform automatic login on the second website using a second login account bound to the first login account, and ii) sends page data corresponding to the URL address of the target page on the second website to trigger the client to jump to the target page. receiving, at a server of a first website and from a user-side client, a visit request for a target page on a second website, wherein the second website comprises a website on which a service resource to be visited by a user is located; determining, by the server of the first website, whether the service resource is a local service resource of the first website or not, wherein a local service resource of the first website comprises a service resource with corresponding login domain configuration information that is maintained by the server of the first website; in response to determining that the service resource of the second website is not a local service resource, determining, by the server of the first website and based on a pre-stored mapping, a URL address of the target page on the second website; querying a login status of a user's first login account on the first website to determine whether the first login account is in a logged-in state or not; in response to determining that the first login account is in a logged-in state, generating an automatic login token based on a token generation rule agreed by the second website; creating a first automatic login link that comprises a URL address of an automatic login portal of the second website and the automatic login token; sending the first automatic login link to the client, so that the client visits the first automatic login link to send the visit request for the target page that comprises the automatic login token to the automatic login portal of the second website; and after validating, by a server of the second website, the automatic login token, the server of the second website i) authorizes the client to perform automatic login on the second website using a second login account bound to the first login account, and ii) sends page data corresponding to the URL address of the target page on the second website to trigger the client to jump to the target page.