The invention discloses a transmission cavity frequency regulator capable of carrying out frequency stabilization on multiple beams of laser, and relates to the field of laser frequency stabilization. The abstract attached diagram is a structure diagram of the transmission cavity frequency regulator capable of carrying out frequency stabilization on four beams of laser. The frequency regulator is composed of a transmission cavity (11), a reference laser (1), four lasers to be stabilized with different wave lengths (2, 3, 16 and 17), lenses (4, 5, 6, 18 and 19), reflector mirrors (7, 10, 20 and 21), spectroscopes (8, 9, 22 and 23), a piezoelectric controller (12), a calculation controller (13), a temperature controller (14) and a photoelectric detector (15). The transmission cavity frequency regulator capable of carrying out frequency stabilization on the multiple beams of laser has the advantages of being capable of simultaneously locking the frequencies of the multiple beams of laser, restraining long-time drifting of the frequencies of the multiple beams of laser, being convenient to use, saving space and lowering cost, and can be widely applied to the fields needing laser frequency stabilization such as laser physics, frequency standards and quantum information.