The invention provides a basal screeding material with capability of preventing indoor decorative cracking, relates to the field of indoor decoration materials, in particular belongs to a screeding material used for priming a putty coating layer on an inner wall and aims to solve the problem of the traditional indoor anti-cracking material that the anti-cracking effect is poor and the action is unabiding. The basal screeding material is prepared from the components in parts by weight: 10-30 parts of buffer reinforced fiber, 35-50 parts of light thermal insulation material, 15-35 parts of inorganic mineral humidifying material, 3-15 parts of soft elastic material, 10-25 parts of thickening limiting material, 10-35 parts of redispersible emulsion powder, 2-15 parts of antibiosis and anti-mildew agent, 5-20 parts of anti-caking agent and 5-15 parts of reinforcing agent. The basal screeding material can be used for obstructing and buffering the direct acting force of deformation of a basal material to putty and a finish coating so as to effectively prevent the occurrence of the indoor decorative cracking, and the functions of facilitating indoor energy-saving and environmental protection as well as physical health are achieved when the cracking problem is solved. The basal screeding material is used as the screeding material for indoor wall faces.