Counter-force frame chamber for shield side launching and mounting method of counter-force frame

The invention discloses a reaction frame chamber used for shield side starting and a mounting method of a reaction frame, the reaction frame chamber used for shield side starting comprises a primary support structure, an underground excavation temporary secondary lining structure is arranged in the primary support structure, a steel base is arranged at the bottom in the underground excavation temporary secondary lining structure, a sliding rail is arranged at the bottom end of the steel base, and the bottom end of the sliding rail is provided with a guide rail; a reaction frame is further arranged in the underground excavation temporary secondary lining structure, and a plurality of reaction frame installation lifting hooks are arranged at the top end in the underground excavation temporary secondary lining structure. Under the condition that a shield launching site is limited and conventional shield launching cannot be adopted, a shield lateral split launching technology is adopted, a counter-force frame is