Abstract: With the increase of logs imported to China by ships,the traditional log transferring operation on land in harbors is becoming the bottleneck,limiting the timber handling capacity of a harbor.The on water operation is adopted in timber storing facilities for transferring log row arriving by ships or by floating rafts,and for transferring bulk logs arriving by ships.As a result,the unloading of logs from ships is speeded up and the handling capacity of a harbor increased.The log transferring and storing machinery and facilities on sea or on river are introduced for timber harbors.With the advance of technology for importing logs by ships,it is suggested that timber carrier fleets be formed,the volume utilization ratio of ship’s hold be raised,and the fast loading and unloading method be adopted.