Using wild filamentous cyanobacteria as host, the adsorption rate of cyanophage PP was studied by centrifugation method, the burst size and the latent period were studied by measuring the One-step growth curve of cyanophage PP. The adsorption rate was 1.79‰ in 60min,and the successful contact ratio was 8.09% correspondingly. The latent period was about 45-75min, and the average burst size was 34.32 PFU•Cel^l-1. All the results mentioned above were obviously lower than the results previously published for the laboratory host (Plectonema boryanum IU594 ). Besides, the high adsorption rate and short latent period, in the infection of the wild host, might contribute to the wide distribution of cyanophage PP in eutrophicated freshwater.