The invention discloses a closed fireplace with an intake air distribution system, comprising a heath, a combustion conveyor and a hot air system. The heath is internally provided with a ventilation pipeline and a combustion chamber; the bottom of the combustion chamber is provided with a fireplace box in long groove structure; the length direction of the fireplace box is identical with the widthdirection of the fireplace; the bottom of the fireplace box is provided with a heating rod both sides of which are provided with air inlets; and the box wall of the fireplace box is provided with a plurality of secondary air inlets. The invention effectively solves the problems of fuel integration, low combustion efficiency and great environmental pollution existing in the traditional fireplace using wood grains as fuel, also solves the problems of flame integration, unobvious heat feeling and poor viewing effect existing in the traditional fireplace, has great fireplace flame width, strong heat feeling, good viewing effect, high heat efficiency, little environmental pollution and notable economic benefits and social benefits.