Password seamless switching method and system based on alternate connection verification

The invention relates to a password seamless switching method and system based on alternate connection verification, and the method comprises the steps: an application end saves a replacement password and a to-be-modified password at the same time, sequentially uses the replacement password and the to-be-modified password to establish a first connection and a second connection, and carries out the password switching according to the connection establishment condition, the normal processing of the in-transit request is not influenced during the password updating period, and the updating of the user password of the client and the server is completed under the condition of not restarting, so that the time and energy investment of personnel for regularly updating and maintaining the database is completely reduced; meanwhile, password updating does not need manual processing, and the data security is further improved. When the password switching is executed, full-process automatic execution can be simply and conve