The utility model discloses a concrete foundation that is used for flat platform of natural gas modular device's grid, include strip footing that flat frame construction bottom set up at the bottom ofthe modular device of the flat platform of grid and the stake shape basis that sets up in the modular device stabilizer blade frame construction bottom of the flat platform of grid, the strip footingincludes pre -buried reinforcing bar and the basic rag bolt hole of setting in the concrete in the concrete, stake shape basis is including pre -buried reinforcing bar and rag bolt in the concrete. Compared with the prior art, the utility model has the advantages that: be bar or stake type with the whole civil engineering basis form optimization of traditional device, saved the concrete quantity,shortened on -the -spot construction cycle, reduced the basic investment cost of device.