Abstract: A pot experiment was conducted to study the Eleocarpus glabripetalus seedlings leaf chlorophyll fluorescence characteristics and growth in different seasons under simulated acid rain stress (heavy, pH=2.5; moderate, pH=4.0; and control, pH=5.6). In the same treatments, the leaf relative chlorophyll content(SPAD), maximum PSⅡ photochemical efficiency (F_v/F_m), actual PSⅡ photochemical quantum yield (Φ_PSⅡ), plant height, and stem diameter in different seasons were all  in the order of October>July>April>January. In the same seasons, all the parameters were in the order of heavy acid rain>moderate acid rain>control. The interactions between different acid rain stress and seasons showed significant effects on the SPAD, F_v/F_m, plant height, and stem diameter, but lesser effects on Φ_PSⅡ， q_P and q_N.

Key words: acid rain stress, Eleocarpus glabripetalus, chlorophyll fluorescence characteristic, growth, season