Sleeve grouting connecting joint, connecting structure of prefabricated part and construction method

The invention provides a sleeve grouting connecting joint, a connecting structure of a prefabricated part and a construction method thereof. The sleeve grouting connecting joint comprises a sleeve, first steel reinforcing ribs, second steel reinforcing ribs and grouting materials. The first steel reinforcing ribs and the second steel reinforcing ribs extend into the sleeve from two ports of the sleeve, the first steel reinforcing ribs and the second steel reinforcing ribs are provided with multiple transverse ribs which are distributed at intervals, an inner cavity of the sleeve is filled withthe grouting materials, the parts, extending into the sleeve, of the first steel reinforcing ribs and/or the second steel reinforcing ribs are anchorage segments, the outer side faces of the anchorage segments are provided with longitudinal ribs, and multiple grooves distributed at intervals are formed in the longitudinal ribs in the length direction of the longitudinal ribs, on the premise of not reducing the property o