A touchpad-based fast information input interaction method, comprising the following steps: S1, dividing the touchpad into a plurality of areas by coordinate points; S2, creating a database containing the correlation between the touchpad coordinate areas and key code values and a database containing the correlation between key code values and stored contents, wherein each touchpad coordinate area corresponds to two or more key code values; S3, switching the touchpad into keyboard function; obtaining, by the operating system, a trigger action signal on the touchpad and the coordinate information of the corresponding position on the touchpad where the trigger action signal has been generated; wherein the keyboard function and the mouse function of the touchpad can be switched therebetween; S4, determining the key code value used, to search the corresponding content from the database, and inputting the content in the position of the cursor or executing a corresponding instruction; wherein in step S3, the switching between the keyboard function and the mouse function of the touchpad is implemented specifically in the following manner: S31, setting a specific shortcut key or a specific gesture corresponding to the switching between the keyboard function and the mouse function of the touchpad, and storing the specific shortcut key and the specific gesture into the database; S32, detecting the I/O port of the system, and when the corresponding shortcut key or gesture is detected, switching between the keyboard function and the mouse function of the touchpad is performed, and characterized by: binding the starting function of the application program with the keyboard function of the touchpad, when the touchpad is switched into keyboard function, the application program is started; when the touchpad is switched into mouse function, the application program is closed. S1, dividing the touchpad into a plurality of areas by coordinate points; S2, creating a database containing the correlation between the touchpad coordinate areas and key code values and a database containing the correlation between key code values and stored contents, wherein each touchpad coordinate area corresponds to two or more key code values; S3, switching the touchpad into keyboard function; obtaining, by the operating system, a trigger action signal on the touchpad and the coordinate information of the corresponding position on the touchpad where the trigger action signal has been generated; wherein the keyboard function and the mouse function of the touchpad can be switched therebetween; S4, determining the key code value used, to search the corresponding content from the database, and inputting the content in the position of the cursor or executing a corresponding instruction; wherein in step S3, the switching between the keyboard function and the mouse function of the touchpad is implemented specifically in the following manner: S31, setting a specific shortcut key or a specific gesture corresponding to the switching between the keyboard function and the mouse function of the touchpad, and storing the specific shortcut key and the specific gesture into the database; S32, detecting the I/O port of the system, and when the corresponding shortcut key or gesture is detected, switching between the keyboard function and the mouse function of the touchpad is performed, and characterized by: binding the starting function of the application program with the keyboard function of the touchpad, when the touchpad is switched into keyboard function, the application program is started; when the touchpad is switched into mouse function, the application program is closed. S31, setting a specific shortcut key or a specific gesture corresponding to the switching between the keyboard function and the mouse function of the touchpad, and storing the specific shortcut key and the specific gesture into the database; S32, detecting the I/O port of the system, and when the corresponding shortcut key or gesture is detected, switching between the keyboard function and the mouse function of the touchpad is performed, and characterized by: binding the starting function of the application program with the keyboard function of the touchpad, when the touchpad is switched into keyboard function, the application program is started; when the touchpad is switched into mouse function, the application program is closed.