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In view of the poor reliability of sunshine conveyor problem, we design a combined function with automatic features of PV - LED tunnel direct lighting system and control method. The system makes full use of the scattering of sunlight rainy days, so that the enhanced lighting parts change automatically according to the intensity of sunlight outside the tunnel .This system effectively avoid the sunshine conveyor itself exists because of the weather overcast or sunny changes in the sun and sometimes lead to poor working stability in congenital defect. To achieve the basic lighting and tunnel lighting system enhancements from the basic theory and practice on the promotion and application of solar energy has opened up a new path. 