The invention provides an automobile glass detergent, which comprises the following components in parts by weight: 50 to 70 parts of 
selaginella uncinata extract, 10 to 15 parts of alkenyl 
succinic anhydride, 15 to 20 parts of 
trisodium nitrilotriacetate, 10 to 15 parts of 
barium sulfate, 5 to 12 parts of 
citronella oil, 20 to 30 parts of Chinese 
rose extract, 7 to 12 parts of glycerin, 5 to 8 parts of surfactant, 6 to 9 parts of 
antioxidant, and 100 to 150 parts of isopropanol. The detergent is prepared by the following steps: evenly mixing and stirring alkenyl 
succinic anhydride, 
trisodium nitrilotriacetate, 
barium sulfate, and isopropanol, then adding 
selaginella uncinata extract and Chinese 
rose extract, heating to a temperature of 38 DEG C, maintaining the temperature for 2 hours, heating the mixture under stirring, finally adding residual components, evenly stirring, allowing the 
system to stand still for 10 to 15 hours, and taking the supernate namely the automobile glass detergent. The detergent comprises 
selaginella uncinata extract and Chinese 
rose extract, has a strong decontaminating performance, can kill 
bacteria, and does not leave any mark on the glass.