The invention relates to a green and environment-friendly indoor wall surface decoration method, and relates to the technical field of building decoration engineering. The method comprises the following steps that S1, wall surface repairing is carried out, a wall surface base layer is cleaned up, and then cement mortar is used for repairing, so that the wall surface is flat; S2, brushing with putty is conducted, and the surface of the cleaned wall surface base layer is uniformly brushed with the putty through a brushing mechanism; S3, wall surface grinding is conducted, and the wall surface isground; S4, wall surface cleaning is conducted, and the ground wall surface is cleaned; and S5, brushing with a green environment-friendly coating is conducted, and the wall surface is brushed with the green environment-friendly coating through the brushing mechanism. The method has the effects that after brushed, the wall surface is smoother, and the aesthetic degree of the wall surface is improved.