Double scroll tooth of scroll compressor and design method of meshing profile of tooth

The invention discloses a double scroll tooth of a scroll compressor and a design method of a meshing profile of the tooth. The profile of a first fixed scroll tooth body (1) of the double scroll tooth comprises six curves comprising the first arc L1M1, a second arc M1N1, a first circular involute N1P1, a third arc L1S1, a fourth arc S1I1 and a second circular involute I1Q1; the adjacent curves are smoothly connected except for the meshing point L1; the first fixed scroll tooth body (1) is identical to a second fixed scroll tooth body (3); the first fixed scroll tooth body (1) is rotated clockwise or anticlockwise by 90 degrees with the circle center point O of a base circle as the center, and a first moving scroll tooth body (2) and a second moving scroll tooth body (4) are obtained; in the operation process, the moving scroll tooth bodies and the fixed scroll tooth body are correctly meshed; and the provided double scroll tooth has the advantages of high air input, simple design steps and easy machining, an