[Problem] To provide: a crosslinked organosilicon resin having a crosslinked structure formed by reacting a silicone or hydrocarbon having alkenyl groups at both ends with a hydroxyl group-containing organosilicon resin, wherein the crosslinked organosilicon resin can be dissolved in a liquid oil at room temperature and can be formed into a film by volatilizing the oil； a method for producing the crosslinked organosilicon resin； and a cosmetic containing the crosslinked organosilicon resin. [Solution] The present invention provides a crosslinked organosilicon resin represented by average composition formula (1). [In the formula, each R1 is independently a C1-30 substituted or unsubstituted monovalent hydrocarbon group which does not have an aliphatic unsaturated bond, and optionally, a portion of each R1 may be a hydroxyl group, each R2 is independently a polyoxyalkylene-containing group, a polyglycerin-containing group, or a group selected from the options for R1, at least one R2 in each R23SiO1/2 unit is a polyoxyalkylene-containing group or a polyglycerin-containing group, each R3 is independently an organopolysiloxane-containing group or a group selected from the options for R1, at least one R3 in each R33SiO1/2 unit is an organopolysiloxane-containing group, X is a divalent group represented by general formula (2) or general formula (3) (In formula (2), each R4 is independently a substituted or unsubstituted C1-30 monovalent hydrocarbon group which does not have an aliphatic unsaturated bond, e is an integer of 0≤e≤500, and l is an integer of 0≤l≤5) (In formula (3), f is an integer of 0≤f≤20), a1, a2, a3, a4, b, c, and d are numbers satisfying 0≤a1≤400, 0≤a2≤200, 0≤a3≤400, 0≤a4≤50, 0≤b≤320, 0≤c≤320, 0≤d≤1,000, and 0.5≤(a1+a2+a3+a4)/d≤1.5, and p is an integer of 1≤p≤3.]Le problème décrit par la présente invention est de fournir : une résine d'organosilicium réticulée ayant une structure réticulée formée par la réaction d'une silicone ou d'un hydrocarbure posséda
