The main purpose of this paper is to introduce and study new classes of softclosed sets like soft regular generalized b-closed sets in soft topological spaces (briefly softrgb-closed set) Moreover, soft rgb-closed, soft gpr-closed, soft gb-closed, soft gsp-closed, softg$\alpha$-closed, soft g$\alpha$b-closed, and soft sgb-closed sets in soft topological spaces are introduced in this paper and we investigate the relations between soft rgb-closed set and the associated softsets. Also, the concept of soft semi-regularization of soft topology is introduced and studiedtheir some properties. We introduce these concepts which are defined over an initial universewith a fixed set of parameters. پرونده مقاله