The invention discloses a communication cavity air guide and pressure grout supply method used for sleeve grouting connection. A plurality of air guide hoses are led from a joint communication cavity,one ends of the air guide hoses are arranged at the four corners of the joint communication cavity, the other ends of the air guide hoses are led out of the joint communication cavity and arranged onthe side face of an upper section of a prefabricated part in the vertical direction in an attached manner, and the other ends of the air guide hoses are higher than the upper end faces of steel bar sleeves. Because the liquid levels in the air guide hoses are higher than the steel bar sleeves, pressure grout supply can be carried out on the interiors of the steel bar sleeves, and it is more convenient for an operator to judge the current grouting progress and situation according to the liquid level changes in the air guide hoses and make adjustment in real time. According to the communicationcavity air guide and pressure grout supply method used for sleeve grouting connection effectively, the problem that air is prone to not being discharged adequately in the prior art is solved, meanwhile the grout supply process is simplified, the connection quality of a precast concrete member is improved, and the working efficiency is improved.