Disclosed is a frost protection machine fixed support with a side extending plate at the bottom comprising a frost protection machine (1), a connecting support (2), and a pedestal (3)； the connecting support (2) is composed of an anti-tilting guide barrel (21), a fixed pillar (22), a rib plate (23), and a connecting plate (24)； the pedestal (3) consists of a pedestal plate (31), a side extending adjusting rod (32), a pedestal bolt (33), and the side extending plate (36)； and the pedestal bolt (33) is used for fixing the connecting support (2) and the pedestal (3)； and the side extending adjusting rod (32) is used for driving and fixing the side extending plate (36). Through use of the pedestal plate (31) and the side extending plate (36), the capabilities to resist horizontal torsion and tilting of the frost prevention machine column are improved, the working reliability of the frost prevention machine (1) is increased, and the problems of generation of a gap between the soil and the upright column under effects such as small-diameter deep hole excavation and working vibration of the frost prevention machine and stability are prevented. Due to use of the connecting support (2), a standard pipe is used to replace a traditional non-standard pipe, greatly saving on material costs. The frost prevention machine fixed support relieves the labour intensity in installation of the frost prevention machine, reduces the cost, improves the installation efficiency and the economic benefit, and also facilitates transportation and storage of the frost prevention machine.L'invention porte sur un support fixe de machine de prévention du gel pourvu d'une plaque s'étendant latéralement au niveau du bas, comprenant une machine (1) de prévention du gel, un support (2) de liaison et un socle (3) ； le support (2) de liaison est constitué d'un cylindre (21) de guidage anti-inclinaison, d'un pilier (22) fixe, d'une plaque (23) nervurée et d'une plaque (24) de liaison ； le socle (3) est cons
