1. There are biodegradable components in drug management, including: (1) a mixture composed of at least three copolymers of different blocks, each of which is: (a) a biodegradable copolymer, whose formula is a7515-b695a-739a is polyester, B is polyethylene, V and X are polyethylene； a. 1 to 3000 to W is 3 to 300 to v = x or v 1 x； or (b) a biodegradable capsule copolymer, the formula of which is: c696-a7611a is polyester, C is polyethylene of protected extreme, e and Z are repetition units, y = 2 to 250 and z = 1 to 3000；2. The mixture contains at least one (a) and one (b)；The weight ratio between (a) and (b) is 1:19 to 5:1； for at least one co Olympic member calculated according to (a) or (b) a, this ratio is poly (lactate co ethanol) (PLGA)；And (II) at least one effective pharmaceutical ingredient. 8. Claim 8: components that are biodegradable when a drug is used in accordance with any of the above requirements, The characteristics also include: (a) a biodegradable PVC, the formula is: PLGA 7515a-peg695a-plga739v, where V and X are the number of repeat units between 1 and 3000 to W, and between 3 and 300 to v = x or V = 1x；Y / O (b) a biodegradable copolymer coating: mpeg6966-plga7611a, where y and Z are the number of repeating units, ranging from 2 to 250 to Z and from 1 to 3000. 9. Claim 9: components that are biodegradable when a drug is used in accordance with any of the above requirements, 2. The composition also includes: and (a) a biodegradable polyvinyl chloride, the formula is: pcla7515-peg695a-pcla739v, where V and X are the number of repeat units between 1 to 3000 to W, and between 3 to 300 to v = x or V = 1x；Y / O (b) a biodegradable copolymer coating, the formula is: mpeg6966-pcla7611y, where y and Z are the number of repeating units, ranging from 2 to 250 to Z, ranging from 1 to 3000. 11. Claim 11: according to any one of the above requirements, the biodegradable component of the drug, which is characterized by that the component is an injectable liq
