Abstract: To solve the problem of pond harvest work entirely depending on manpower nowadays, a mechanized harvest system for fishpond was developed. This system was designed by locating steel wire rope on both sides of the pond to guide netting gear, making use of hydraulic winch and trawl apparatus to accomplish the continuous trawl. According to the mechanical trawl experimentation carried out in the pond sized 50 m×100 m, the result showed that the velocity of trawl was 10 m/min, and the number of trawl staffs were reduced from 12 to 5, the efficiency of trawl fishing was approximately 64.8%. It was concluded that this system can reduce the number of labors, run smoothly, and it is applicable for all kinds of harvesting operations in rectangular ponds.