The invention aims at providing a 
porphyra haitanensis shell conchocelis 
ripening and 
seedling collecting method. The method comprises the following steps: (1) cultivating shell conchocelis before 
ripening, (2) 
ripening shell conchocelis, (3) synchronously diffusing conchospore and (4) collecting the conchospore. The 
porphyra haitanensis shell conchocelis ripening and 
seedling collecting method is simple to operate, shortens the transportation process, and can produce the spatfall 
porphyra haitanensis with good quality. Therefore, the production mode of improving synchronous 
diffusion of the 
porphyra haitanensis conchospore becomes an approach of relieving 
seedling cultivation and seedling collection of the 
porphyra haitanensis with good quality and reducing seedling cultivation cost. The 
porphyra haitanensis shell conchocelis ripening and seedling collecting method is simple and practicable and good in effect. Compared with the traditional technology, labor strength is reduced, working procedures are reduced, the quality of the porphyra haitanensis 
spore is good, and production efficiency is obvious.