In order to verify the applicability and reliability of longitudinal reinforcing steel grouted connecting in prefabricated components of shale ceramsite concrete, specimens were tested under monotonic tension test, high strength cyclic load test and large deformation cyclic load test. The influencing factors on connection performance including the strength of shale ceramsite concrete and lapping length of steel were analyzed. The test results indicate that no slippage occurs in all specimens' longitudinal steel, and the ultimate failure of all specimens are steel outside the splice broken up or yielding. It is suggested that the lapping length of grouted steel should not be less than 1.0l_aE. When the lapping length of steel is greater than or equal to 1.0l_aE, the ultimate tensile strength of splice will be increased with the higher strength of shale ceramsite concrete. The grouted connecting is suitable for the reliable connection of longitudinal reinforcing steel in prefabricated components of shale ceramsite concrete, when it satisfies certain structural requirements.