The invention relates to a dead ship stability test constraint system based on weight balancing. The dead ship stability test constraint system based on weight balancing is characterized in that the stern end of the ship is provided with a first rod member; the tail end of the first rod member is provided with a first circular ring structure; the bow end of the ship is provided with a second rod member; the tail end of the second rod member is provided with a second circular ring structure; a left metal wire penetrates through the first circular ring structure; a right metal wire penetrates through the second circular ring structure; the first metal wire at one end of the left metal wire and the fourth metal wire at one end of the right metal wire are combined to connect with a pulley system; the second metal wire at one end of the left metal wire and the third metal wire at one end of the right metal wire are combined to connect a spring; and the spring is fixedly connected with a trailer.