The invention discloses an intraocular display device based on retinal scanning. The device comprises a first flexible substrate on the same side as an eyelid, a second flexible substrate on the sameside as a cornea, a light emitting diode array arranged between the first flexible substrate and the second flexible substrate, a light collimator, an electric control liquid crystal grating used foradjusting the light direction, and a control unit. The light emitting diode array is connected with the light collimator, and the control unit is connected with the light emitting diode array and theelectric control liquid crystal grating and receives and transmits image information and light angle information; the device is worn on the cornea of a human eye, so that exit pupil enlargement and human eye tracking are not needed, and the system complexity is simplified; by matching the number of the light-emitting diodes with the cone cell density, central concave imaging is achieved in an annular scanning mode, and The invention has the advantages that the highest angular resolution of human eyes is met. The total pixel number is reduced, and the time delay and device power consumption forprocessing high-resolution images are reduced. The invention is suitable for the intelligent contact lenses oriented to augmented reality, virtual reality and mixed reality.