The invention discloses an indoor coating with a PM2.5 absorbing effect. The indoor coating comprises the following components by weight percent: 0.1-0.3% of efficient adsorbent, 0.1-0.2% of micro-nano permanent magnet powder, 1-3% of dispersing agent, 2-10% of pigment, 0.02-0.05% of cerium oxide, 30-50% of acrylate emulsion and the balance of water. On the basis of the traditional indoor emulsion paint, the efficient adsorbent and the micro-nano permanent magnet powder are added into the indoor coating, wherein the efficient adsorbent is modified by utilizing nanoscale attapulgite as a template and the titanium dioxide with a special structure is formed on a modified titanium slice surface, so that the excellent PM2.5 absorbing property is achieved; the added permanent magnet powder has a synergic effect and an absorbing effect is better; less cerium oxide is added as a catalyst, so that the shortening of the film-forming time is benefited, the film-forming thickness is reduced, the construction is more convenient and the cost is lower.