The invention discloses an arrangement form of an output shaft of a variable speed clutch applied to an SHRT unit, and relates to the arrangement of the output shaft. The arrangement of an output shaft of a variable speed clutch in an original BPRT unit is prone to cause a vibration phenomenon or influence on the service life generated when the variable speed clutch is affected by external disturbing force. One end of a gear shaft is in rigid connection with the input end of a synchronous automatic clutch. The output end of the synchronous automatic clutch is in rigid connection with one end of the output shaft. The other end of the output shaft is fixedly connected with one end of a coupler. The two ends of the gear shaft are each sleeved with a gear shaft sliding shaft and installed in ashaft neck of the gear shaft sliding shaft. The end, connected with the synchronous automatic clutch, of the output shaft is sleeved with a supporting sliding bearing and installed in a shaft neck ofthe supporting sliding bearing. The end, connected with the coupler, of the output shaft is sleeved with a supporting pushing bearing. The two gear shaft sliding bearings, the supporting sliding bearing and the supporting pushing bearing are all fixedly installed on a box of the variable speed clutch. The arrangement form of the output shaft is applied to the variable speed clutch.