A touch control method for a device having a foldable screen including a display, wherein a touch sensor is disposed on the display and the touch sensor and the display form a touchscreen, wherein the foldable screen comprises a first display region, a second display region, and a third display region; when the device is in a folded form, an included angle between the first display region and the second display region is less than or equal to a first preset angle; the third display region is disposed between the first display region and the second display region, the third display region is a foldable region and when the third display region is bent or deformed, the third display region is forming a side screen; where, when the device is in a folded form, touch control operations performed on the side screen are used for controlling the first display region and/or the second display region; the method further comprises: displaying a first interface of a first application in the first display region, wherein the first interface comprises at least one control (1103, 1104, 1105) located at a certain region of the first display region; detecting an operation of a user for selecting the control (1103, 1104, 1105) in the interface and determining a to-be-mapped control in response to the operation; detecting a touch control operation performed by the user on the side screen and determining a region in which the touch control operation is performed, namely, a target region to be projected by the to-be-mapped control (1103, 1104, 1105) displayed in the first interface in the first display region; establishing a mapping relationship between the target region on the side screen and the region at which the to-be-mapped control (1103, 1104, 1105) in the interface is located; detecting a first operation that is a touch operation in the target region in the third display region forming the side screen; and controlling the first display region and/or the second display region by mapping an operation performed in the target region to an operation performed on the region at which the to-be-mapped control in the interface is located. displaying a first interface of a first application in the first display region, wherein the first interface comprises at least one control (1103, 1104, 1105) located at a certain region of the first display region; detecting an operation of a user for selecting the control (1103, 1104, 1105) in the interface and determining a to-be-mapped control in response to the operation; detecting a touch control operation performed by the user on the side screen and determining a region in which the touch control operation is performed, namely, a target region to be projected by the to-be-mapped control (1103, 1104, 1105) displayed in the first interface in the first display region; establishing a mapping relationship between the target region on the side screen and the region at which the to-be-mapped control (1103, 1104, 1105) in the interface is located; detecting a first operation that is a touch operation in the target region in the third display region forming the side screen; and controlling the first display region and/or the second display region by mapping an operation performed in the target region to an operation performed on the region at which the to-be-mapped control in the interface is located.