The invention discloses a mobile modular gas turbine power station. The mobile modular gas turbine power station is formed by connecting a first vehicle, a second vehicle and a third vehicle, the first vehicle comprises a gas turbine power system, a transmission system and a semitrailer chassis system, the gas turbine power system comprises a starter, a gearbox, a high-speed coupler and an engine,the transmission system is composed of a low-speed coupler, a first bearing, a transmission shaft, a second bearing and a flexible coupler, and a second vehicle power generation and distribution system comprises a generator, a generator installing base, a generator power shaft and a power distribution cabinet. According to the mobile modular gas turbine power station, a gas turbine is adopted asa prime mover, a power generation system composed of the gas turbine is compactly integrated on a movable chassis, and by adopting a combined mode, the power system, the power generation and distribution system and an exhaust system are correspondingly placed on different mobile carrier platforms, so that modular assembly is realized, and meanwhile, an independent exhaust noise reduction system isadopted for carrying out exhaust heat dissipation and high-frequency noise reduction on the gas turbine.