During oxygenic photosynthesis, photosystem II (PSII) utilizes light energy for oxidizing water and reducing plastoquinone. It is susceptible to photodamage and the damaged PSII is repaired through a sophisticated biological process assisted by numerous auxiliary proteins. Here we report the cryo-EM structures of four different PSII-repair complexes associated with the Thylakoid Enriched Fraction 30 (TEF30) protein, namely a TEF30-associated PSII core monomer (TEF30-C), two types of TEF30-associated PSII core dimers (types I and II, TEF302-C2-I and TEF302-C2-II) and a TEF30-associated C2S-type PSII-LHCII supercomplex (TEF30-C2S; S, strongly-associated light-harvesting complex II trimer). Intriguingly, TEF30 mediates the assembly of CP43 with RC47 module by clamping on the stromal surfaces and prevents the premature association of peripheral antennae with PSII-C. In the transition from TEF302-C2-I to TEF302-C2-II, TEF30-C2S and mature C2S2, one PSII core slides along the dimerization interface against the adjacent one by 22-35 Å, generating a zigzagged surface for accommodating the peripheral antennae. The results suggest that the PSII repair process undergoes multiple TEF30-mediated intermediate states to form intact PSII-LHCII supercomplexes.