Secret-related USB interface authorization connection equipment and authorization connection method thereof

The invention discloses secret-related USB interface authorization connection equipment and an authorization connection method thereof. The method comprises the following steps: S1, authorizing a connection device to access a secret-related host, and confirming the security of a secret-related environment; s2, the mobile storage device is inserted into a corresponding USB female head on the authorization connection device, and authorization information of a user is judged through at least two random identity verification modes; s3, after it is judged that the authorization information of the user is correct, a contact switch on a data transmission line is closed, the mobile storage device is made to communicate with the authorization connection device, and the authorization information of the mobile storage device is judged; and S4, according to the authorization information of the mobile storage device, in combination with the authorization information of the user and the environment information of the secre