Solar solar sludge drying sludge drying characteristics compared with conventional thermal drying technology, its main advantage is: ① energy consumption, low operating and administrative expenses (in the absence of additional deodorizing system conditions, evaporation of water 1 t power consumption is only 25 ~ 30kWh, while conventional thermal drying technology requires low power consumption is 800 ~ 1060kWh); ② treated sludge volume reduction of up to 3 to 5 times, to achieve stabilization and still retains its original agricultural reuse value (low-temperature drying); ③ stable and secure system operation, low temperature, low dust generation; ④ simple operation and maintenance, long service life; ⑤ high degree of transparency systems, and environmental good; ⑥ can simultaneously solve the sludge storage needs; ⑦ use of renewable solar energy as the primary energy source to meet the needs of sustainable development.