Abstract: The samples of wild Porphyra haitanensis were collected from different environment in Pingtan Island of Fujian Province.Through enzymolysis to somatic cells and their self-reproduction, the conchocelis and thallus of wild stain B, C and D were obtained after 2~3 years selection and cultivation.The results are as follows: (1) The wild-selected strain B, C and D exhibited relatively faster growth, which was about 3.25~3.75 cm/d.The thallus growth of Strain A, which has not been selected, was about 2.12 cm/d.Traditional cultivated strain exhibited the slowest growth, only 1.37 cm/d.(2) Strain B exhibited remarkable resistance to high temperature.The increasing rate of weight per day could reach up to 4.34% after cultured for 10 days in 30, while the control stain began to rot after cultured for 5 days in 27.(3) Strain B exhibited remarkable tolerance to low capacity of N and P.In low nitrogen and phosphorus environments, the blades color of strain B became buff after 9 days cultivation.But it recovered to normal condition after cultured for 3 days in seawater of normal content of nitrogen and phosphorus.However, the control group began to rot in the middle part of blade after 6 days and the rot ten proportion was about 2/3 in 9^th days in the same condition.(4) The phycobiliproteinin content of stain B was 98.89 mg/g, but the number was only 50.04 mg/g when it comes to control group.Therefore, strain B shows superiority in growth rate, high-temperature resistance and low-N-and-P tolerance.The results are helpful for genetic improvement, wild strains selective breeding and utilization in P.haitanensis.