The invention discloses a multi-finger touch method, a device and a portable type terminal device. The multi-finger method comprises the steps of responding the fact that a user stretches out at least one finger to point a computer screen, identifying human eyes and at least one finger in an image frame collected by a video camera, mapping a first coordinate of the identified finger in the image frame as a second coordinate of the finger in the computer screen, mapping a third coordinate of the identified human eyes in the image frame as a fourth coordinate of the human eyes in the computer screen, judging whether the fourth coordinate is close to the second coordinate or not, and determining that the second coordinate is a multi-finger touch point in order to respond the fact that a judging result is yes.