The invention discloses a street tree point cloud identification method based on laser reflection intensity. The method comprises the following steps: S1, establishing a distance correction model andan incident angle correction model of the laser reflection intensity; S2, for a to-be-detected area, selecting a part of street trees as samples, and obtaining point cloud data; S3, calculating corrected laser reflection intensity according to the correction model; s4, performing region segmentation on the corrected laser reflection intensity to obtain the crown and trunk laser reflection intensity of the street tree sample, generating a histogram, and setting an identification threshold; and S5, for the whole to-be-measured area, scanning to obtain laser reflection intensity, and judging whether the point cloud belongs to a crown or trunk target or not according to an identification rule. According to the identification method, the influence of the distance and the incident angle on the intensity is removed, the laser reflection intensity distribution of the crown and the trunk after correction is analyzed, the point cloud of the crown and the trunk of the street tree is identified, and ground objects such as buildings, pedestrians, lanes, sidewalks, turfs and street lamps are filtered out.