Pressurized water injection device

The utility model discloses a pressurized water injection device applied to the technical field of oilfield water injection. An inlet of the pressurized water injection pump is connected with an inlet pipeline of the pressurized water injection pump; the inlet pipeline of the pressurized water injection pump is sequentially connected with a first gate valve, a high-pressure filter and a second gate valve; inlet bypass pipelines of the pressurized water injection pump are connected at the inlet-end pipeline of the first gate valve and the outlet-end pipeline of the second gate valve; an outlet of the pressurized water injection pump is connected with a water outlet pipeline of the pressurized water injection pump; the water outlet pipeline of the pressurized water injection pump is sequentially connected with a check valve and a valve; high-pressure backflow pipelines are connected to the inlet-end pipeline of the first gate valve and the inlet-end pipeline of the check valve; and each high-pressure backflow p