Compared with ordinary space images, the laser three-dimensional barrier-free space image contains more information, which brings great difficulty to the image enhancement algorithm. In order to improve the quality of the laser three-dimensional barrier-free space image, the laser three-dimensional barrier-free space image enhancement algorithm under virtual reality technology is proposed. Under the virtual reality technology, the laser three-dimensional barrier-free space image is generated, and the combination of bilateral and guided filtering is used to denoise, and the image features are extracted. In addition, the enhancement processing results of the laser three-dimensional barrier-free space image are obtained through the steps of deblur, transformation enhancement, detail feature enhancement, color enhancement and so on. Through the test experiment, the conclusion is that compared with the traditional image enhancement algorithm, the optimized design algorithm shows that the signal-to-noise ratio and contrast of the enhanced image are higher, which increase by about 49 dB and 68 dB respectively, which proves that the optimized design algorithm has better image enhancement effect.