Water-soluble paclitaxel anticancer drug compound and its preparation method and use

The invention discloses a water-soluble paclitaxel anticancer drug compound. The water-soluble paclitaxel anticancer drug compound has a structure shown in the formula I. Anticancer drug active ingredients of paclitaxel and polyethylene glycol monoalkyl ether are covalently bound by a linking group (carbonylmethoxyacetyl) to form the water-soluble paclitaxel anticancer drug compound. The invention also relates to a preparation method and a use of the drug compound.