Verfassung von Tarnowo
In 1884 he began to participate in the Bulgarian politics; became an editor of the Liberal Party newspaper "Tarnovo Constitution". Rizov was a part of the immigrant wave in the Eastern Rumelian capital Plovdiv, where he actively participated in the Bulgarian Secret Central Revolutionary Committee and in the preparations for the Bulgarian unification. He was a member of the temporary government in Plovdiv on September 6–9, 1885. Rizov was an MP in the Third Great National Assembly (Parliament)(1886–87). In 1887 he continued his education in University of Liège in Belgium with an Evlogi Georgiev stipend.