The invention relates to a method and a mould for manufacturing one-piece composite material slips, and is used for making the composite material slips; the composite material slips comprises a slips base body (1) and teeth (2); the method for manufacturing the composite material slips comprises the following steps of: S1, assembling, mould pressing and forming the mould, and adjusting the position of a hydraulic push rod; S2, arranging the teeth (2) on the top end of the hydraulic push rod; S3, closing the mould and filling composite material into a mould cavity; S4, heating the mould up to 150-300 DEG C and pressuring the mould up to 30-60KN; S5, starting a hydraulic cylinder, and pushing the teeth (2) into the mould cavity; and S6, demoulding after heat preservation is carried out for 30-60min. The mould comprises an upper mould (101), a lower mould (102) and the hydraulic push rod (104). According to the invention, the teeth are inserted and buried into the slips base body at the different angles, and the teeth and the slips base body are molded into a whole; and the method is few in processing steps, high in production efficiency and capable of realizing rapid large scale production.