The invention discloses an omnibearing sun tracker, which comprises a light signal collecting control module, a direction control module, an angle regulating module and a light collecting module, wherein the light signal collecting control module comprises a shadow projection device, an electrical signal comparison circuit and a driving chip, a direction regulating module comprises a rotary base, a direction regulating electric motor and a connecting table, the angle regulating module comprises a connecting element, an angle support plate and an electric motor, the light collecting module comprises a light collecting plate and a fixing device, the shadow projection device is arranged on the light collecting plate, a light sensitive element is arranged on the shadow projection device, the light collecting board is vertical to the incident direction of sun rays, or a certain angle is formed between the light collecting board and the incident direction of the sun rays, the poling projection of the shadow projection device is projected onto the light sensitive element, variable electric signals of the light sensitive element are transmitted to the electrical signal comparison circuit, then, signals are output to the driving chip, and the driving chip controls the direction regulating electric motor and the electric motor to operate. The omnibearing sun tracker has the advantages that the structure is simple, the installation is convenient, the omnibearing regulation can be realized, and the omnibearing sun tracker can be installed in any latitude without prior-period regulation.