The invention provides a linear multi-station device for connecting metal sheets through laser shock and a method thereof. The device is composed of a laser emission system, a control system and a deformation connecting system. The laser emission system is composed of a base, a lens support, a pulsed laser device, a mirror and an adjustable focusing lens. The control system is composed of a laser controller, a computer, a hydraulic control system, a stepping motor controller and a three-dimensional moving platform controller. The deformation connecting system is composed of an edge pressing device, a workpiece system, a combined female die, an automatic die opening and closing device, a linear multi-station unit and a three-dimensional moving platform. According to the linear multi-station device, pulsed lasers are used as an energy source, deformation connection of two or more layers of the same or dissimilar metal sheets is achieved through the combined female die, the clamping-connection degree between the metal sheets is improved, multi-point connection between the sheets is achieved through the linear multi-station unit, and the connection strength is improved. The female die is automatically opened and closed through the automatic die opening and closing device, so that the work efficiency is improved; when the female die is closed, the linear multi-station device has a self-locking function, so that the precision of deformation connection is guaranteed.