Low-density foaming cement and preparation method thereof

The invention discloses a low-density foaming cement, which comprises the following components in parts by weight: 60 to 120 parts of cement, 0.3 to 1.0 part of coagulant, 0.4 to 1.0 part of foam stabilizer, 0.5 to 1.2 parts of water reducer, 9 to 14 parts of foaming agent, 0.2 to 0.5 part of fiber, and 25 to 50 parts of water. The invention also discloses a preparation method of the low-density foaming cement. The low-density foaming cement is prepared through the following steps: evenly stirring dry powder, adding water to prepare cement slurry, adding a foaming agent under rapid stirring, casting to mould, and carrying out natural maintenance; and has the advantages of low dry density and low thermal conduction coefficient.