The present invention relates to a manufacturing method using a net for growing marine algae, and more specifically, to a manufacturing method using a net for growing marine algae which stably guides rooting of growing marine algae such as brown algae, red algae, and green algae and prevents the marine algae from being easily separated even in an area with strong waves or water currents when spores of the marine algae adhere to grow and to improve adhesion and growing efficiency, and maximally secures a space to which the spores of the marine algae adhere to increase production of the marine algae. The manufacturing method using a net for growing marine algae comprises: (a) a step of preparing a unit resin string (10) by combining or twisting a plurality of strands of single yarn； (b) a step of preparing a plurality of the unit resin strings (10) of the step (a), and twisting the unit resin strings (10) in one direction to form a body unit string (20)； a step of preparing a plurality of the unit resin strings (10) of the step (a), and twisting the unit resin strings (10) in one direction to form a body insertion string (30)； (d) a step of allowing the body insertion string (30) of the step (c) to pass between the body unit strings (20) in a zigzag pattern to form a net base string (40) having a shape where the body insertion string (30) protrudes to the outside at regular intervals； (e) a step of preparing a plurality of the net base strings (40) of the step (d) to bind the net base strings (40) to have a net or a net shape to form a base net body (50)； and (f) a step of preparing a plurality of the base net bodies (50) of the step (e) to pull both ends of the base net bodies (50) to form a single string shape and then bind the base net bodies (50) to manufacture a net (1).본 발명은 해조류 양식용 그물 제조방법에 관한 것으로서, 더욱 상세하게는 갈조류·홍조류·녹조류 등의 해조류가 포자를 착생시켜 양식할 때에 그 양식되는 해조류의 뿌리 활착을 안정적으로 유도함과 동시에 파도나 물살이 강한 지역에서도 쉽게 탈리되지 않도록 하여 착생 및 양식 효율을 향상시키고, 또한 해조류의 포자가 착생할 수 있는 공간을 최대한 확보하여
