The invention discloses an achiral side methyl alkyl terphenyl liquid crystal compound, a production method of the achiral side methyl alkyl terphenyl liquid crystal compound, a liquid crystal composition and application. The achiral side methyl alkyl terphenyl liquid crystal compound is of a molecular structure as shown in a formula (I) as shown in the specification. An achiral conformation branch end group of the compound (I) makes the compound (I) have a wide-temperature nematic phase state, and the branch end group improves the flexibility of a molecule, so that the compound (I) has a lowmelting point and large dielectric and optical anisotropy; due to a stable molecular structure of the compound (I), microwave absorption is little so that dielectric loss of a microwave device can bereduced; the compound (I) and other nematic liquid crystal compounds can be mixed to form a nematic liquid crystal material with large dielectric anisotropy and large optical anisotropy; and by applying the compound (I) into the microwave device, improvement of the phase modulation capability of the liquid crystal microwave device is facilitated, and a quality factor of the liquid crystal materialas a microwave medium is increased.