Transmission device for connecting mini-tiller and crawler carrier, and connection method

The invention discloses a transmission device for connecting a mini-tiller and a crawler carrier. The transmission device for connecting the mini-tiller and the crawler carrier comprises a shaft sleeve, wherein the shaft sleeve is connected with a power output shaft of the mini-tiller, a driving gear is arranged on the outer surface of the shaft sleeve in a sleeved mode, the driving gear is meshed with a driven gear, and the driven gear is arranged on the output shaft in a penetrating mode through a bearing; a sliding gear sleeve, a compression return spring and an output shaft sleeve are further sequentially arranged on the output shaft in a sleeved mode from right to left, the compression return spring is located between the output shaft sleeve and the sliding gear sleeve, the sliding gear sleeve is rotationally connected with the output shaft and is in clearance fit with the output shaft, and a clutch shifting fork device is arranged on the sliding gear sleeve; and the clutch shifting fork device can drive