The present invention relates to a light mould component for filling concrete. It includes a mould body, and it is characterized by that in at least one vertical turning corner position of at least one side surface of said mould body a curved angle is set and passed through upper surface and lower surface, the vertical curved angle is perpendicular to the upper surface or lower surface of said mould body. Said light mould component can be used for in-situ casting reinforced concrete or prestressed reinforced concrete hollow floor, roof, wall body foundation bedplate and bridge. Specially, it can be used for in-situ casting hollow beamless floor. |