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.