In view of the problem that visible light communication (VLC) is interfered by strong background light in outdoor transmission, this paper analyzes the visible light channel in outdoor strong background light environment, and proposes a method for suppressing low-frequency outdoor shot noise based on hardware filtering, according to the characteristic that the main interference source is low-frequency sunlight in outdoor environment. We realize the point-to-point reliable communication based on white-light LED with low bit error rate (BER) under strong background light interference. Experimental results show that the noise suppression method has a BER of less than 10 ^-5and a data transmission rate up to 8 Mbit/s.