The invention provides a method for detecting a vascularization degree of the surface of a filtering bleb based on ophthalmic slit lamp photographing. Based on a slit lamp microscope photographing system wide in clinic application, quantification indexes for evaluating blood vessels on the surface of the filtering bleb are provided, the degree of the blood vessels on the surface of the filtering bleb is reflected by a filtering bleb blood vessel area index and a filtering bleb hyperemia index, a vascularization degree objective evaluation method for the surface of filtering bleb is established, and the inflammation state of the filtering bleb is reflected.