The invention discloses a garden nursing maintenance device and a maintenance method thereof. According to the invention, fixed frames are fixedly connected with and arranged at the top end of a baseat equal intervals; door plates are fixedly connected with and arranged at the positions, corresponding to the inner sides of the fixed frames, of two sides of the top end of the base; windproof plates are fixedly connected with and arranged at the positions, corresponding to the side edges of the fixed frames, of the top end of the base; a collecting, anti-waterlogging and infiltration system isarranged at the top ends of the windproof plates; and a protective sun-shading and cooperative collecting mechanism is arranged at the position, corresponding to the top part of the collecting, anti-waterlogging and infiltration system, of one ends of the fixed frames. The garden nursing maintenance device provided by the invention is scientific and reasonable in structure and safe and convenientto use; through arrangement of the collecting, anti-waterlogging and infiltration system, rainwater is filtered through arc-shaped filtering plates, so the rainwater falls onto a water collecting box;through flow guiding grooves located at the top end of the water collecting box, the rainwater is drained into a water storage cavity, so the rainwater is collected, and the rainwater recycling effect is guaranteed, and the resource utilization rate is increased; vegetation is cultivated through cultivation grooves; meanwhile, water in the cultivation grooves is filtered into water collecting grooves through grids.