A scroll compressor, comprising a first end cover , a casing and a crankshaft ; wherein: the casing is provided with a supporting portion having a first bearing mounting portion ; the first end cover is provided with a second bearing mounting portion ; a first bearing is sleeved over a first end of the crankshaft , the first end of the crankshaft is provided with a stopping step , an axial limitation is formed between a stopping step at the first end of the crankshaft and the first bearing mounted in a bearing mounting opening formed in the first bearing mounting portion , which bearing mounting opening opens towards the stopping step , and the first end of the crankshaft is arranged in the first bearing mounting portion through the first bearing ; a second bearing is mounted in the second bearing mounting portion , an axial limitation is formed between a stopping step at a second end of the crankshaft and the second bearing , and the second end of the crankshaft is arranged in the second bearing mounting portion through the second bearing ; characterized in that the first bearing mounting portion and the second bearing mounting portion cooperate with each other to form an axial limitation on the crankshaft ; the casing is further provided with a fixed scroll supporting seat ; the scroll compressor further comprises a fixed scroll arranged in the fixed scroll supporting seat ; the fixed scroll supporting seat is arranged at a side of the fixed scroll from which teeth of the fixed scroll protrude, and a tooth base of the fixed scroll is arranged in the fixed scroll supporting seat ; the fixed scroll supporting seat has a stepped groove , and the fixed scroll is disposed in the stepped groove ; and the scroll compressor further comprises a second end cover , and the second end cover is arranged on a supporting end surface of the fixed scroll supporting seat . the casing is provided with a supporting portion having a first bearing mounting portion ; the first end cover is provided with a second bearing mounting portion ; a first bearing is sleeved over a first end of the crankshaft , the first end of the crankshaft is provided with a stopping step , an axial limitation is formed between a stopping step at the first end of the crankshaft and the first bearing mounted in a bearing mounting opening formed in the first bearing mounting portion , which bearing mounting opening opens towards the stopping step , and the first end of the crankshaft is arranged in the first bearing mounting portion through the first bearing ; a second bearing is mounted in the second bearing mounting portion , an axial limitation is formed between a stopping step at a second end of the crankshaft and the second bearing , and the second end of the crankshaft is arranged in the second bearing mounting portion through the second bearing ; characterized in that the first bearing mounting portion and the second bearing mounting portion cooperate with each other to form an axial limitation on the crankshaft ; the casing is further provided with a fixed scroll supporting seat ; the scroll compressor further comprises a fixed scroll arranged in the fixed scroll supporting seat ; the fixed scroll supporting seat is arranged at a side of the fixed scroll from which teeth of the fixed scroll protrude, and a tooth base of the fixed scroll is arranged in the fixed scroll supporting seat ; the fixed scroll supporting seat has a stepped groove , and the fixed scroll is disposed in the stepped groove ; and the scroll compressor further comprises a second end cover , and the second end cover is arranged on a supporting end surface of the fixed scroll supporting seat . <EOS>