The invention discloses an air purifier good in filtering effect and suitable for outdoor haze absorbing, and solar energy serves as a power source of the air purifier. The solar outdoor haze purifier comprises a solar battery panel shell, an inner filtering channel, a telescopic air pipe and a storage battery. The filtering channel is internally provided with an air inlet net, a press-in type draught fan, a three-level filtering system and an automatic PM2.5 monitor from top to bottom. The three-level filtering system is divided into a primary filtering system, an intermediate filtering system and an advanced filtering system, wherein the primary filtering system is composed of an initial effect filter net and a nanocat, the intermediate filtering system is composed of an AV990 sterilization piece and a pure diatom filtering piece, and the advanced filtering system is composed of an HEPA efficient filtering piece and a composite efficient filter net. In the using process, air is sucked into the filtering channel through the draught fan, smoke, dust and PM2.5 particles in air can be adsorbed through the three-level filtering system, bacteria are killed out, and the ideal purifying effect is achieved. The automatic PM2.5 monitor can be used for detecting the air quality, real-time feedback is achieved, and the purified air arrives at the near ground to be exhausted through the telescopic air pipe.