The invention belongs to the technical field of wireless communications, and relates to a cellular network and internet of things fusion symbiotic system transmission method. The invention provides two schemes for accessing Internet of things equipment into a network; in the first scheme, reflection equipment (namely, the Internet of things equipment) is accessed into the network by using an uplink signal in the cellular network, and a base station simultaneously demodulates a signal of a user in the cellular network and a signal of the reflection equipment in the Internet of things; and in the second scheme, the reflection equipment is accessed into the network by using a downlink signal in the cellular network, and a user side in the cellular network simultaneously demodulates a signal of the base station in the cellular network and the signal of the reflection equipment in the Internet of things.