Disclosed is a frost prevention machine support with an adjustable bottom structure, comprising a frost prevention machine, a connecting support, a base, and a base bolt. The connecting support is composed of an anti-tilting guide barrel, a fixing strut, a rib plate and a connecting plate. The base is formed by assembling a base plate, a rotary plate, a pin shaft, a guide rod and a direction control pin shaft, wherein the base plate and the rotary plate are connected through the pin shaft, and the base plates are connected through an upper connecting ring and a lower connecting ring. Each guide rod is mounted in two guide grooves of the corresponding base plate. The base bolt is used for fixedly connecting the connecting support and the base. By adjusting and controlling the earth entering direction of the rotary plate, the ultimate shape of the base is big at the bottom and small at the top so that the frost prevention machine can be reliably fixed. By means of the connecting support, non-standard tubular products which needed to be used originally for meeting the height requirement of the frost prevention machine can be replaced by a standard tubular product, thereby improving the mounting efficiency, the operating reliability and the economic benefits of the frost prevention machine.L'invention concerne un support de machine anti-givre à structure inférieure réglable, comprenant une machine anti-givre, un support de liaison, une base et un boulon de base. Le support de liaison est composé d'un cylindre de guidage anti-basculement, d'un pied de fixation, d'une plaque à nervure et d'une plaque de liaison. La base est formée par l'assemblage d'une plaque de base, d'une plaque rotative, d'une tige de broche, d'une tige de guidage et d'une tige de broche de commande de direction, la plaque de base et la plaque rotative étant reliées par l'intermédiaire de la tige de broche, et les plaques de base étant reliées par l'intermédiaire d'un anneau de liaison supérieur et d'
