Negative expansion material, and preparation method and application thereof

The invention provides a Mn (Co, Ni) Ge based negative expansion material. The material comprises alloy particles and an adhesive which can bond the alloy particles into a block material. The chemical general formula of the alloy particles is Mn1-xMxCoGe, MnCo1-xMxGe, MnCoGe1-xMx, Mn1-yAyNiGe, MnNi1-yAyGe or MnNiGe1-yAy, wherein M is holes, In, Cr, Ga, Al, P, Cu, Fe, V, Si, Sn or Sb, A is holes, Fe or Sn, x is larger than 0 but smaller than or equal to 0.3, and y is larger than 0 but smaller than or equal to 0.5. The negative expansion behavior of the material is adjustable along with the components and the process parameters, the maximum negative expansion coefficient exceeds most of already reported materials, and the negative expansion material can be used as a material for compensating a high heat expansion coefficient.