The invention discloses constitutional repeating units of an organic polysiloxane containing multiple functional groups, which is shown as right formula: in the formula, a, b and c are respectively the
molar fractions of corresponding constitutional repeating units, wherein, 0<a<1, 0<b<1, 0<c<1 and p=1 to 200. The invention further discloses the preparation of the organic polysiloxane containing multiple functional groups. The organic polysiloxane containing multiple functional groups provided by the invention not only adds a new variety for organic polysiloxane compounds, but also provides anew choice for the occasion that organic polysiloxane additive-type
flame retardant is utilized. In the invention, when the new structural organic polysiloxane containing multiple functional groups isprepared by the method, the selected
raw material monomers are all environment-friendly and non-toxic, corrosive gas and toxic
wastewater are not produced in the reaction process, thereby not only avoiding adverse impacts on the environment, but also avoiding a series of problems resulting in cost increasing, which are brought by later-stage
wastewater treatment.