The invention discloses a path planning device of a laser shot blasting strengthened hook surface. The path planning device comprises a high energy pulse laser, a positioning laser, a CCD displayer, a correction block, a correction reflection film and a mechanical arm. The positioning laser and the CCD displayer are symmetrically arranged on the two sides, the correction block is provided with a correction plane, the correction reflection film is attached to the correction plane, the mechanical arm clamps and can freely adjust the correction block or a workpiece, and a visible laser beam is reflected to the CCD displayer. The invention further discloses a path planning method for the laser shot blasting strengthened hook surface. The parallel visible laser beam, the reflection film and the CCD displayer serve as positioning tools; the steps of distancing, positioning calibrating, tracing point positioning, coordinate recording, fitting of the coordinates into a trajectory path and the like are included; the device and method are adopted to conveniently and rapidly achieve running path planning of the hook surface in laser shot blasting strengthening, the method and device can be used for laser shot blasting strengthening of aircraft engine blades and steam turbine blades, the working position of the hook surface can be precisely located, the laser utilization rate is greatly improved, and power and density consistency in the strengthening process is ensured.