A fiber Bragg grating (FBG) sensing network using code division multiplexing (CDM) and time division multiplexing (TDM) increases the multiplying density, but decreases the network′s dynamic performance and is difficult to be implemented in engineering for its complex structure. A new kind of FBG sensing network using CDM and wavelength division multiplexing (WDM) by coding measuring points directly with 2D-CDMA codes is proposed, which increases the multiplying density while does not influence its dynamic performance and is easy to be implemented in engineering for its simple structure. Simulation experiment indicates that in a spectral range of 10 nm, 49 FBG sensors can be arranged in this type of sensing network, and the measuring range of every sensor reaches 10 nm.