[Objective]Researching linear plasmids transformation system and improving the transformation efficiency of C. reinhardtii. [Methods]The single enzyme cutting test of p SP108 plasmid was carried out,the linear plasmid was transformed by glass-bead method and key transformation conditions were optimized,finally,the transformation result was verified by resistance screening,PCR and RT-PCR detection.[Results] The linear plasmid single enzymed by Bam HⅠ,XbaⅠ,EcoRⅠ and SacⅠcould be successfully transformed,and t...