The invention discloses a soil recycling mechanism of a flower transplanting machine. The soil recycling mechanism comprises a bottom plate; racks are arranged on two sides of the top of the bottom plate. First and second conveyer belts arranged in parallel are arranged between the racks. A support post is arranged between the first conveyer belt and the second conveyer belt; a bidirectional motoris mounted at the top of one side of the front of the support post; two ends of the bidirectional motor are provided with a spindle I and a spindle II respectively; the end of the spindle I and the second of the spindle II are provided with a fixing block I and a holding plate respectively; a connection bar I penetrates the middle of the fixing block I; the end of the connection bar far away fromthe fixing block I is sleeved with a fixing block III; a support bar is arranged at the bottom of the fixing block III; the bottom of the support bar is fixed to one end of the top of the holding plate. The soil recycling mechanism has the advantages that loss of soil at flower roots during transplanting is avoided, working efficiency is improved effectively, and survival rate of flowering plantsafter planting is increased.