Highly vertical dielectric liquid crystal composition and liquid crystal display device

A liquid crystal composition comprising:

• one or more compounds represented by formula I;
• one or more compounds represented by formula II;
• and
• one or more compounds represented by formula III:
• wherein:
• R1, R2, R3, R5 and R6 each independently represent an alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10 or an alkenoxy group having a carbon atom number of 3-8, and any one or more non-connected CH2 in the groups represented by R1 and R3 may be substituted with cyclopentyl, cyclobutyl, cyclopropyl or —O—;
• R4 represents F, CF3, OCF3, OCHF2 or OCH2F;
• and each independently represent one or more of
• and any fluorobenzene;
• each independently represent one or two of benzene or fluorobenzene;
• represents one or more of
• or any fluorobenzene;
• m, p and w each independently represent 1, 2 or 3;
• and
• n and q each independently represent 0 or 1.