The invention discloses an acid-base resistant all metal flow temperature sensor comprises a housing, a probe, and an electrical part. The housing comprises a housing body made of acid-base resistant metal and a fixing support made of insulation materials. The fixing support is disposed in the inner cavity of the housing in an embedded manner, and the fixing support is provided with an installation part used for installation of a circuit board and a cavity used for accommodating the circuit board. The acid-base resistant all metal flow temperature sensor is advantageous in that the housing adopts the all metal material, which is anti-corrosion and durable, and a high sealing level is achieved, and in addition, embedding technology is not required; the structure is simple, the installation and the maintenance are convenient, the size is small, the cost is low, and the appearance is beautiful; by adopting the design of the fixing support, an insulation protection level is improved, and at the same time, anti-vibration performance and high reliability are provided.