This paper investigated the cultivation and stability of algae-bacteria granular sludge (ABGS) in inorganic wastewater, aiming to provide technical support for the treatment of ionic rare earth mine wastewater. Aerobic granular sludge (AGS) and algal liquid were inoculated to start the photo-sequencing batch reactor, and coagulant was regularly added to promote the rapid enrichment of algae in Days 1-45. During the operation, the number and particle size of AGS decreased continuously, but algae gradually enriched. The algae-bacteria symbiosis system was successfully constructed on Day 42, and mature ABGS was cultured on Day 129. On Day 145, the average particle size and sludge concentration of ABGS were 0.46 mm and 1750 mg/L, respectively, the SVI was 51.43 mL/g, the Chlorophyll a content of sludge was 17.48 mg/L, the dominant bacterial genera were Blastopirellula (relative abundance of 16.70%), SM1A02 (relative abundance of 12.91%), Nitrosomonas (relative abundance of 7.78%), etc, and the dominant algae was Chlorella (relative abundance of 88.06%). The removal efficiencies of ammonia nitrogen and total inorganic nitrogen (TIN) fluctuated greatly in Days 1-67 and 105-131, and the removal efficiencies of ammonia nitrogen and TIN were basically close to 100 % and 60 % in Days 68-104 and 132-145, respectively. The oxygen production rate of algae showed a overall decreasing trend, and remained at approximately 15 mgO2/(L·h)-1 from Day 100. The contribution rate of algae for TIN removal was gradually decreased from approximately 100% to 15 % calculated by algae assimilation model and TIN in the influent and effluent.