The utility model relates to a sterilization machine for food, in particular to a tubular sterilization machine, solving the problems in the prior art that fruit and vegetable fibrous fragments are attached onto a temperature sensor, and the fruit and vegetable fibrous fragments attached to the temperature sensor are very hard to clean during cip cleaning. In order to reach the aims, the tubular sterilization machine is divided into three parts, including a temperature rising stage, a temperature preserving stage and a temperature reducing stage, and the three parts are connected with one another by pipelines in a winding way. The temperature sensor is inclined towards a material outflow direction at a straight pipe, an angle between the temperature sensor and a material flow direction is 30-45 degrees, and the temperature sensor, the top of an elbow head and the material flow direction are in parallel at an angle of 180 degrees at an elbow pipe. The resistance of the temperature senor to the fruit and vegetable pulps and the fruit grains can be greatly reduced, the fruit and vegetable fibrous fragments hardly are wound onto the temperature sensor as well and can be easily cleaned during the cip cleaning process, the improvement is least in investment but best in effect.