Disclosed is a system, with a rain trap (11), for protecting against acid rain, the protection system comprising a rainwater collector (1), a rainwater-monitoring meter (2), a telescopic support (3), an electric motor (4) and a canopy (5). The rainwater-monitoring meter (2) is connected to the electric motor (4). The rainwater collector (1) comprises the funnel-shaped rain trap (11) and a rainwater container (12). The rainwater container (12) is fixed to a lower end of the rain trap (11). The rainwater-monitoring meter (2) is used for detecting a characteristic value of rainwater in the rainwater collector (1), and sending a control signal to the electric motor (4) after the control signal is generated according to the characteristic value. The electric motor (4) performs corresponding operations after receiving the control signal. The telescopic support (3) is connected to the electric motor (4). The canopy (5) is fixed to the telescopic support (3). When the telescopic support (3) opens, the canopy (5) opens therewith and when the telescopic support (3) closes, the canopy (5) closes therewith. The system, with the rain trap (11), for protecting against acid rain can control the start of the electric motor (4) so as to open the telescopic support (3) and the canopy (5) after acid rain is detected, and block the acid rain by means of the canopy (5), thus achieving the effect of protecting soil and plants under the canopy (5).Linvention porte sur un système, équipé dun piège à pluie (11), pour la protection contre les pluies acides, le système de protection comprenant un collecteur deau de pluie (1), un dispositif de mesure deau de pluie (2), un support télescopique (3), un moteur électrique (4) et un auvent (5). Le dispositif de mesure deau de pluie (2) est relié au moteur électrique (4). Le collecteur deau de pluie (1) comprend le piège à pluie en forme dentonnoir (11) et un réservoir deau de pluie (12). Le réservoir deau de pluie (12) est fixé à une extrémité infé
