Concentrated water recycling system of reverse osmosis filter device

The utility model discloses a concentrated water recycling system of a reverse osmosis filter device, which comprises a concentrated water pretreatment system and a secondary reverse osmosis system, wherein the concentrated water pretreatment system comprises a reaction tank, a settling tank and a carbonizing tank which are in a step arrangement in sequence; the reaction tank is provided with a reverse osmosis concentrated water input end; the input end of the setting tank is connected with the output end of the reaction tank; the input end of the carbonizing tank is connected with the output end of the setting tank; the concentrated water pretreatment system comprises a sludge treatment system and a pipe type microfiltration system; the sludge treatment system is connected with the setting tank and the carbonizing tank simultaneously; the output end of the carbonizing tank is connected with the input end of the pip type microfiltration system; a power pump is arranged on a connecting pipeline of the carbonizing tank and the pipe type microfiltration system; the pipe type microfiltration system is provided with a filter liquor outlet and a concentrated water outlet which is directly connected with the carbonizing tank; and the filter liquor outlet is connected with the secondary reverse osmosis system. The concentrated water recycling system can realize high recycling rate of concentrated water.