Fixed chassis for surveying instrument

The utility model discloses a fixed chassis for a surveying instrument. The dust cover comprises a fixed base and a dust cover body capable of covering the fixed base. At least two connecting blocks are arranged on the inner wall of the dustproof cover; the connecting block is connected with the dustproof cover through a bolt; wherein the fixed base is connected with the dustproof cover through aconnecting block, a surveying and mapping instrument main body is arranged on the fixed base, a first support is fixed to the bottom of the surveying and mapping instrument main body through a bolt, aconnecting rod is arranged on the inner wall of the first support, the dustproof cover is also located on the outer wall of the fixed base, and the dustproof cover is of an annular structure. According to the fixed chassis for the surveying instrument, the dustproof cover with the height capable of being adjusted in a telescopic mode is arranged on the outer wall of the fixed base; when the surveying and mapping instrumen